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Changes for page 10 Constraints

Last modified by Artur on 2025/09/10 11:19
From version 3.3
edited by Helena
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To version 1.16
edited by Helena
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1 -Age|Artefact|Attribute|Code|Code list|Comment|Component|Data set|Data structure definition|Dataflow|Dimension|Maintainable artefact|Measure|Member selection|Metadata set|Metadata structure definition|Metadataflow|Observation value|Provision agreement|Reference metadata|Series key|Sex|Statistical data and metadata exchange|Time period
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4 4  
5 5  == 10.1 Introduction ==
6 6  
7 -(% style="color:#e74c3c" %)Constraints(%%) are used as a way to restrict what data can be reported, or to report what data exists in a given context.  There are three types of (% style="color:#e74c3c" %)Constraint(%%), which serve different purposes
7 +Constraints are used as a way to restrict what data can be reported, or to report what data exists in a given context.  There are three types of Constraint, which serve different purposes
8 8  
9 -* Availability (% style="color:#e74c3c" %)Constraint
10 -* [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint
11 -* Reporting (% style="color:#e74c3c" %)Constraints
9 +* Availability Constraint
10 +* Dimension Constraint
11 +* Reporting Constraints
12 12  
13 -An Availability (% style="color:#e74c3c" %)Constraint(%%) defines the data that exists in the context of a data query.
13 +An Availability Constraint defines the data that exists in the context of a data query.
14 14  
15 -They form part of the response message from the Availability REST API. Availability (% style="color:#e74c3c" %)Constraints(%%) are dynamically generated by a system based on the data that exists and the query context.  Availability (% style="color:#e74c3c" %)Constraints(%%) are therefore not Identifiable structures (they have no URN).
15 +They form part of the response message from the Availability REST API. Availability Constraints are dynamically generated by a system based on the data that exists and the query context.  Availability Constraints are therefore not Identifiable structures (they have no URN).
16 16  
17 -A [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) is a property of a [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]], they are used to fix the [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] that they use in the [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] which they use. [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraints(%%) enable [[Data Structure Definitions>>doc:sdmx:Glossary.Data structure definition.WebHome]] to evolve over time by having new [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] added, without having to undergo a major (% style="color:#e74c3c" %)version(%%) change. 
17 +A Dimension Constraint is a property of a Dataflow, they are used to fix the Dimensions that they use in the Data Structure Definition which they use. Dimension Constraints enable Data Structure Definitions to evolve over time by having new Dimensions added, without having to undergo a major version change. 
18 18  
19 -A Reporting (% style="color:#e74c3c" %)Constraint(%%) is used to define the set of allowed and/or disallowed values that can be reported in a data or [[metadata set>>doc:sdmx:Glossary.Metadata set.WebHome]].
19 +A Reporting Constraint is used to define the set of allowed and/or disallowed values that can be reported in a data or metadata set.
20 20  
21 21  == 10.2 Availability Constraint ==
22 22  
23 -An Availability (% style="color:#e74c3c" %)Constraint(%%) is not a maintained structure, instead it is generated dynamically as a response to the availability REST API. The purpose of the Availability (% style="color:#e74c3c" %)Constraint(%%) is to define the distinct set of values that have data over 1 or more [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]].  Unlike a Data and Metadata (% style="color:#e74c3c" %)Constraint(%%), which can attach to multiple Constrainable structures (of the same type), an Availability (% style="color:#e74c3c" %)Constraint(%%) can only attach to only one structure.  The attachment defines the context of the response (data exists for [[components>>doc:sdmx:Glossary.Component.WebHome]] in the context of).  The subset of Constrainable structures the Availability (% style="color:#e74c3c" %)Constraint(%%) can attach to are:
23 +An Availability Constraint is not a maintained structure, instead it is generated dynamically as a response to the availability REST API. The purpose of the Availability Constraint is to define the distinct set of values that have data over 1 or more Dimensions.  Unlike a Data and Metadata Constraint, which can attach to multiple Constrainable structures (of the same type), an Availability Constraint can only attach to only one structure.  The attachment defines the context of the response (data exists for components in the context of).  The subset of Constrainable structures the Availability Constraint can attach to are:
24 24  
25 -* [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]]
26 -* [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]
27 -* [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]]
25 +* Data Structure Definition
26 +* Dataflow
27 +* Provision Agreement
28 28  
29 29  == 10.3 Dimension Constraint ==
30 30  
31 -A [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) is a property of a [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]; its purpose is to explicitly list the [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] from the corresponding [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] that are being used by the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]. 
31 +A Dimension Constraint is a property of a Dataflow; its purpose is to explicitly list the Dimensions from the corresponding DSD that are being used by the Dataflow. 
32 32  
33 -[[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraints(%%) were introduced in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.1 and are not required for most [[Dataflows>>doc:sdmx:Glossary.Dataflow.WebHome]] where the [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] must always contain the full complement of [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] as defined by the corresponding [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]]. However, for some complex data collections, which may span long periods and where the full complement of required [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] are not necessarily known at design time, the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] is subject to increasing its Dimensionality over time.  In this scenario it is possible to define the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] as an evolving structure, this property tells the user that the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] can have new [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] added without having to undergo a major (% style="color:#e74c3c" %)version(%%) change; a [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] at (% style="color:#e74c3c" %)version(%%) 1.0.0 for example would be able to add a new [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] and move to (% style="color:#e74c3c" %)version(%%) 1.1.0; a change that would not ordinarily be allowed.  A minor (% style="color:#e74c3c" %)version(%%) change on the addition of a new [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] is only possible if the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] defines itself as an evolving structure.   This is a new property of the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] introduced in (% style="color:#e74c3c" %)version(%%) 3.1 to satisfy this use case.  The evolving structure  property is either true or false, defaulting to false if not specified.  Setting the evolving structure property to true requires a major (% style="color:#e74c3c" %)version(%%) change, and therefore can only be introduced on an x.0.0 release (e.g. 1.0.0).  The evolving structure property can be set to false to indicate that there will be no additional [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] added to the Data Structure under the same major (% style="color:#e74c3c" %)version(%%) number; setting the evolving structure property to false does not require require a major (% style="color:#e74c3c" %)version(%%) change on the Data Structure.   
33 +Dimension Constraints were introduced in SDMX 3.1 and are not required for most Dataflows where the dataset must always contain the full complement of Dimensions as defined by the corresponding DSD. However, for some complex data collections, which may span long periods and where the full complement of required Dimensions are not necessarily known at design time, the DSD is subject to increasing its Dimensionality over time.  In this scenario it is possible to define the DSD as an evolving structure, this property tells the user that the DSD can have new Dimensions added without having to undergo a major version change; a DSD at version 1.0.0 for example would be able to add a new Dimension and move to version 1.1.0; a change that would not ordinarily be allowed.  A minor version change on the addition of a new Dimension is only possible if the DSD defines itself as an evolving structure.   This is a new property of the DSD introduced in version 3.1 to satisfy this use case.  The evolving structure  property is either true or false, defaulting to false if not specified.  Setting the evolving structure property to true requires a major version change, and therefore can only be introduced on an x.0.0 release (e.g. 1.0.0).  The evolving structure property can be set to false to indicate that there will be no additional Dimensions added to the Data Structure under the same major version number; setting the evolving structure property to false does not require require a major version change on the Data Structure.   
34 34  
35 -When a [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] references a [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]], late binding on the minor release, and the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] has the evolving structure property set to true, then the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] must contain a [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) to protect its Dimensionality from changing over time without a (% style="color:#e74c3c" %)version(%%) change. 
35 +When a Dataflow references a DSD, late binding on the minor release, and the DSD has the evolving structure property set to true, then the Dataflow must contain a Dimension Constraint to protect its Dimensionality from changing over time without a version change. 
36 36  
37 -The [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) provides the explicit list of [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] that the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] uses from the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] that it references.  This enables the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] to evolve over time without breaking the compatibility of [[datasets>>doc:sdmx:Glossary.Data set.WebHome]] against the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]. 
37 +The Dimension Constraint provides the explicit list of Dimensions that the Dataflow uses from the DSD that it references.  This enables the DSD to evolve over time without breaking the compatibility of datasets against the Dataflow. 
38 38  
39 39  __**Rules for a Dimension Constraint**__
40 40  
41 -* A [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] must contain a [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) if the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] which it uses states that it is an evolving structure and the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] is late binding on the minor release (latest minor release of a given major (% style="color:#e74c3c" %)version(%%), e.g. 1.0+.0)
42 -* The [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) can only include [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] from the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] that is referenced by the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]].
43 -* A [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) can only be changed if the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] undergoes a major (% style="color:#e74c3c" %)version(%%) change
44 -* [[Datasets>>doc:sdmx:Glossary.Data set.WebHome]] reported against the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] must only contain reported values for the [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] specified in the [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%). 
45 -* When exporting data for the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]], the [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] should only include the [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] specified by the [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%).
46 -* When exporting data for the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] the [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] must contain the full set of [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] as specified by the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]]. The tilde ‘’ character is used to represent a value which is not present due to the [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] not being included in the corresponding [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]].
41 +* A Dataflow must contain a Dimension Constraint if the DSD which it uses states that it is an evolving structure and the Dataflow is late binding on the minor release (latest minor release of a given major version, e.g. 1.0+.0)
42 +* The Dimension Constraint can only include Dimensions from the DSD that is referenced by the Dataflow.
43 +* A Dimension Constraint can only be changed if the Dataflow undergoes a major version change
44 +* Datasets reported against the Dataflow must only contain reported values for the Dimensions specified in the Dimension Constraint. 
45 +* When exporting data for the Dataflow, the dataset should only include the Dimensions specified by the Dimension Constraint.
46 +* When exporting data for the DSD the dataset must contain the full set of Dimensions as specified by the DSD. The tilde ‘~~’ character is used to represent a value which is not present due to the Dimension not being included in the corresponding Dataflow.
47 47  
48 48  __**Example Datasets with Evolving Structures**__
49 49  
50 -A [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] is built against a [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]].  The [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] contains data for two [[Dataflows>>doc:sdmx:Glossary.Dataflow.WebHome]].  [[Dataflows>>doc:sdmx:Glossary.Dataflow.WebHome]] ‘DF_POP’ uses a [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) which fixes its [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] to  FREQ and REF_AREA.  [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] ‘DF_POP_SA’ does not reference a [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%), and as such includes all [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] as specified by the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]].  
50 +A dataset is built against a Data Structure Definition.  The dataset contains data for two Dataflows.  Dataflows ‘DF_POP’ uses a Dimension Constraint which fixes its Dimensions to  FREQ and REF_AREA.  Dataflow ‘DF_POP_SA’ does not reference a Dimension Constraint, and as such includes all Dimensions as specified by the DSD.  
51 51  
52 -The resulting [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] contains values ‘’ for both the [[SEX>>doc:sdmx:Glossary.Sex.WebHome]] and [[AGE>>doc:sdmx:Glossary.Age.WebHome]] [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] for the series related to DF_POP.
52 +The resulting dataset contains values ‘~~’ for both the SEX and AGE Dimension for the series related to DF_POP.
53 53  
54 54  (% style="width:758.294px" %)
55 -|(% style="width:119px" %)**[[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]**|(% colspan="7" style="width:635px" %)**FREQ REF_AREA [[SEX>>doc:sdmx:Glossary.Sex.WebHome]] [[AGE>>doc:sdmx:Glossary.Age.WebHome]] OBS_VALUE TIME_PERIOD UNIT**
56 -|(% style="width:119px" %)**DF_POP**|(% style="width:55px" %)A|(% style="width:103px" %)UK|(% style="width:79px" %) |(% style="width:92px" %) |(% style="width:93px" %)65|(% style="width:111px" %)2022|(% style="width:101px" %)6
57 -|(% style="width:119px" %)**DF_POP**|(% style="width:55px" %)A|(% style="width:103px" %)FR|(% style="width:79px" %) |(% style="width:92px" %) |(% style="width:93px" %)50|(% style="width:111px" %)2022|(% style="width:101px" %)6
55 +|(% style="width:119px" %)**Dataflow**|(% colspan="7" style="width:635px" %)**FREQ REF_AREA SEX AGE OBS_VALUE TIME_PERIOD UNIT**
56 +|(% style="width:119px" %)**DF_POP**|(% style="width:55px" %)A|(% style="width:103px" %)UK|(% style="width:79px" %)~~|(% style="width:92px" %)~~|(% style="width:93px" %)65|(% style="width:111px" %)2022|(% style="width:101px" %)6
57 +|(% style="width:119px" %)**DF_POP**|(% style="width:55px" %)A|(% style="width:103px" %)FR|(% style="width:79px" %)~~|(% style="width:92px" %)~~|(% style="width:93px" %)50|(% style="width:111px" %)2022|(% style="width:101px" %)6
58 58  |(% style="width:119px" %)**DF_POP_SA**|(% style="width:55px" %)A|(% style="width:103px" %)UK|(% style="width:79px" %)M|(% style="width:92px" %)1|(% style="width:93px" %)1.2|(% style="width:111px" %)2022|(% style="width:101px" %)6
59 59  
60 60  == 10.4 Reporting Constraints ==
61 61  
62 -A Reporting (% style="color:#e74c3c" %)Constraint(%%) is a [[Maintainable Artefact>>doc:sdmx:Glossary.Maintainable artefact.WebHome]] which restricts the values that can be reported in a [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] or [[metadata set>>doc:sdmx:Glossary.Metadata set.WebHome]] based on one or more inclusion or exclusion rules. 
62 +A Reporting Constraint is a Maintainable Artefact which restricts the values that can be reported in a dataset or metadata set based on one or more inclusion or exclusion rules. 
63 63  
64 -A reporting (% style="color:#e74c3c" %)constraint(%%) is one of the following concrete types:
64 +A reporting constraint is one of the following concrete types:
65 65  
66 -* Data (% style="color:#e74c3c" %)Constraint
67 -* Metadata (% style="color:#e74c3c" %)Constraint
66 +* Data Constraint
67 +* Metadata Constraint
68 68  
69 69  === 10.4.1 Data Constraint ===
70 70  
71 -A Data (% style="color:#e74c3c" %)Constraint(%%) is used to add additional restrictions to the allowable values reported in a [[dataset>>doc:sdmx:Glossary.Data set.WebHome]].  Data (% style="color:#e74c3c" %)Constraints(%%) can be applied to the follow structures which are collectively known as Constrainable structures:
71 +A Data Constraint is used to add additional restrictions to the allowable values reported in a dataset.  Data Constraints can be applied to the follow structures which are collectively known as Constrainable structures:
72 72  
73 -* [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]]
74 -* [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]
75 -* [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]]
73 +* Data Structure Definition
74 +* Dataflow
75 +* Provision Agreement
76 76  * Data Provider
77 77  
78 -**Note** regardless of the Constrainable structure, the restricted values relate to  the allowable content for the [[Component>>doc:sdmx:Glossary.Component.WebHome]] of the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] to which the constrained object relates. 
78 +**Note** regardless of the Constrainable structure, the restricted values relate to  the allowable content for the Component of the DSD to which the constrained object relates. 
79 79  
80 80  === 10.4.2 Metadata Constraint ===
81 81  
82 -A Metadata (% style="color:#e74c3c" %)Constraint(%%) is used to add additional restrictions to the allowable values reported in a metadataset.  Metadata (% style="color:#e74c3c" %)Constraints(%%) can be applied to the follow structures which are collectively known as Constrainable structures:
82 +A Metadata Constraint is used to add additional restrictions to the allowable values reported in a metadataset.  Metadata Constraints can be applied to the follow structures which are collectively known as Constrainable structures:
83 83  
84 84  * Metadata Structure Definition
85 -* [[Metadataflow>>doc:sdmx:Glossary.Metadataflow.WebHome]]
86 -* Metadata [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]]
85 +* Metadataflow
86 +* Metadata Provision Agreement
87 87  * Metadata Provider
88 88  
89 -**Note** regardless of the Constrainable structure,  the restricted values relate to  the allowable content for the [[Component>>doc:sdmx:Glossary.Component.WebHome]] of the [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] to which the constrained object relates. 
89 +**Note** regardless of the Constrainable structure,  the restricted values relate to  the allowable content for the Component of the MSD to which the constrained object relates. 
90 90  
91 91  === 10.4.3 Scope of a Constraint ===
92 92  
93 -A (% style="color:#e74c3c" %)Constraint(%%) is used specify the content of a data or metadata source in terms of the [[component>>doc:sdmx:Glossary.Component.WebHome]] values or the keys.
93 +A Constraint is used specify the content of a data or metadata source in terms of the component values or the keys.
94 94  
95 -In terms of data the [[components>>doc:sdmx:Glossary.Component.WebHome]] are:
95 +In terms of data the components are:
96 96  
97 -* [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]]
98 -* Time [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]]
99 -* Data [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]]
100 -* [[Measure>>doc:sdmx:Glossary.Measure.WebHome]]
101 -* Metadata [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]]
102 -* DataKeySets: the keys are the content of the KeyDescriptor – i.e., the [[series keys>>doc:sdmx:Glossary.Series key.WebHome]] composed, for each key, by a value for each [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]].
97 +* Dimension
98 +* Time Dimension
99 +* Data Attribute
100 +* Measure
101 +* Metadata Attribute
102 +* DataKeySets: the keys are the content of the KeyDescriptor – i.e., the series keys composed, for each key, by a value for each Dimension.
103 103  
104 -In terms of [[reference metadata>>doc:sdmx:Glossary.Reference metadata.WebHome]] the [[components>>doc:sdmx:Glossary.Component.WebHome]] are:
104 +In terms of reference metadata the components are:
105 105  
106 -* Metadata [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]]
106 +* Metadata Attribute
107 107  
108 -For a (% style="color:#e74c3c" %)Constraint(%%) based on a [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] the (% style="color:#e74c3c" %)Constraint(%%) can reference one or more of:
108 +For a Constraint based on a DSD the Constraint can reference one or more of:
109 109  
110 -* [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]]
111 -* [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]
112 -* [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]]
110 +* Data Structure Definition
111 +* Dataflow
112 +* Provision Agreement
113 113  * Data Provider
114 114  
115 -For a (% style="color:#e74c3c" %)Constraint(%%) based on an [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] the (% style="color:#e74c3c" %)Constraint(%%) can reference one or more of:
115 +For a Constraint based on an MSD the Constraint can reference one or more of:
116 116  
117 117  * Metadata Structure Definition
118 -* [[Metadataflow>>doc:sdmx:Glossary.Metadataflow.WebHome]]
119 -* Metadata [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]]
118 +* Metadataflow
119 +* Metadata Provision Agreement
120 120  * Metadata Provider
121 -* [[Metadata Set>>doc:sdmx:Glossary.Metadata set.WebHome]]
121 +* Metadata Set
122 122  
123 -Furthermore, there can be more than one (% style="color:#e74c3c" %)Constraint(%%) specified for a specific object e.g., more than one (% style="color:#e74c3c" %)Constraint(%%) for a specific [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]].
123 +Furthermore, there can be more than one Constraint specified for a specific object e.g., more than one Constraint for a specific DSD.
124 124  
125 -In view of the flexibility of (% style="color:#e74c3c" %)constraints(%%) attachment, clear rules on their usage are required. These are elaborated below.
125 +In view of the flexibility of constraints attachment, clear rules on their usage are required. These are elaborated below.
126 126  
127 127  === 10.4.4 Multiple Constraints ===
128 128  
129 -There can be many (% style="color:#e74c3c" %)Constraints(%%) for any Constrainable [[Artefact>>doc:sdmx:Glossary.Artefact.WebHome]] (e.g., [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]]), subject to the following restrictions:
129 +There can be many Constraints for any Constrainable Artefact (e.g., DSD), subject to the following restrictions:
130 130  
131 131  ==== 10.4.4.1 Cube Region ====
132 132  
133 -A (% style="color:#e74c3c" %)Constraint(%%) can contain multiple [[Member Selections>>doc:sdmx:Glossary.Member selection.WebHome]] (e.g., [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]]).
133 +A Constraint can contain multiple Member Selections (e.g., Dimensions).
134 134  
135 -* A specific [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]] (e.g., [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] FREQ) can only be contained in one Cube Region for any one attached object (e.g., a specific [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] or specific [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]).
136 -* [[Component>>doc:sdmx:Glossary.Component.WebHome]] values within a [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]] may define a validity period. Otherwise, the value is valid for the whole validity of the Cube Region.
137 -* For partial reference resolution purposes (as per the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] REST API), the latest non-draft (% style="color:#e74c3c" %)Constraint(%%) must be considered.
138 -* A [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]] may include wildcarding of values (using character ‘%’ to represent zero or more occurrences of any character), as well as cascading through hierarchic structures (e.g., parents in Codelist), or localised values (e.g., text for English only). Lack of locale means any language may match. Cascading values are mutual exclusive to localised values, as the former refer to coded values, while the latter refer to uncoded values.
139 -* Any values included in a [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]] for [[Components>>doc:sdmx:Glossary.Component.WebHome]] with an array data type (i.e., [[Measures>>doc:sdmx:Glossary.Measure.WebHome]], [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]] or Metadata [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]]), will be applied as single values and will not be assessed combined with other values to match all possible array values. For example, including the [[Code>>doc:sdmx:Glossary.Code.WebHome]] ‘A’ for an [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]] will allow any instance of the [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]] that includes ‘A’, like [‘A’, ‘B’] or [‘A’, ‘C’, ‘D’]. Similarly, if [[Code>>doc:sdmx:Glossary.Code.WebHome]] ‘A’ was excluded, all those arrays of values would also be excluded.
135 +* A specific Member Selection (e.g., Dimension FREQ) can only be contained in one Cube Region for any one attached object (e.g., a specific DSD or specific Dataflow).
136 +* Component values within a Member Selection may define a validity period. Otherwise, the value is valid for the whole validity of the Cube Region.
137 +* For partial reference resolution purposes (as per the SDMX REST API), the latest non-draft Constraint must be considered.
138 +* A Member Selection may include wildcarding of values (using character ‘%’ to represent zero or more occurrences of any character), as well as cascading through hierarchic structures (e.g., parents in Codelist), or localised values (e.g., text for English only). Lack of locale means any language may match. Cascading values are mutual exclusive to localised values, as the former refer to coded values, while the latter refer to uncoded values.
139 +* Any values included in a Member Selection for Components with an array data type (i.e., Measures, Attributes or Metadata Attributes), will be applied as single values and will not be assessed combined with other values to match all possible array values. For example, including the Code ‘A’ for an Attribute will allow any instance of the Attribute that includes ‘A’, like [‘A’, ‘B’] or [‘A’, ‘C’, ‘D’]. Similarly, if Code ‘A’ was excluded, all those arrays of values would also be excluded.
140 140  
141 141  ==== 10.4.4.2 Key Set ====
142 142  
143 -Key Sets will be processed in the order they appear in the (% style="color:#e74c3c" %)Constraint(%%) and wildcards can be used (e.g., any key position not reference explicitly is deemed to be "all values").
143 +Key Sets will be processed in the order they appear in the Constraint and wildcards can be used (e.g., any key position not reference explicitly is deemed to be "all values").
144 144  
145 -As the Key Sets can be "included" or "excluded" it is recommended that Key Sets with wildcards are declared before KeySets with specific [[series keys>>doc:sdmx:Glossary.Series key.WebHome]]. This will minimize the risk that keys are inadvertently included or excluded.
145 +As the Key Sets can be "included" or "excluded" it is recommended that Key Sets with wildcards are declared before KeySets with specific series keys. This will minimize the risk that keys are inadvertently included or excluded.
146 146  
147 -In addition, [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]], [[Measure>>doc:sdmx:Glossary.Measure.WebHome]] and Metadata [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]] (% style="color:#e74c3c" %)constraints(%%) may accompany KeySets, in order to specify the allowed values per Key. Those are expressed following the rules for Cube Regions, as explained above.
147 +In addition, Attribute, Measure and Metadata Attribute constraints may accompany KeySets, in order to specify the allowed values per Key. Those are expressed following the rules for Cube Regions, as explained above.
148 148  
149 149  Finally, a validity period may be specified per Key.
150 150  
151 151  === 10.4.4 Versioning ===
152 152  
153 -When Data and Metadata (% style="color:#e74c3c" %)Constraints(%%) are versioned, the latest (% style="color:#e74c3c" %)version(%%) of the (% style="color:#e74c3c" %)Constraint(%%) is used to generate the reporting restriction rules; all previous (% style="color:#e74c3c" %)versions(%%) are for historical information only.
153 +When Data and Metadata Constraints are versioned, the latest version of the Constraint is used to generate the reporting restriction rules; all previous versions are for historical information only.
154 154  
155 -If restrictions are applicable to certain periods in time, the validFrom and validTo properties can be set on the specific values. This allows (% style="color:#e74c3c" %)Constraints(%%) to evolve over time, increasing their (% style="color:#e74c3c" %)version(%%) number as they do so, whilst being able to maintain a complete set of reporting restrictions for current and past [[datasets>>doc:sdmx:Glossary.Data set.WebHome]].
155 +If restrictions are applicable to certain periods in time, the validFrom and validTo properties can be set on the specific values. This allows Constraints to evolve over time, increasing their version number as they do so, whilst being able to maintain a complete set of reporting restrictions for current and past datasets.
156 156  
157 157  Example:
158 158  
159 -Data (% style="color:#e74c3c" %)Constraint(%%) 1.0.0
159 +Data Constraint 1.0.0
160 160  
161 161  (% style="width:573.294px" %)
162 -|(% style="width:108px" %)[[Component>>doc:sdmx:Glossary.Component.WebHome]]|(% style="width:127px" %)Valid Value|(% style="width:150px" %)Valid from|(% style="width:185px" %)Valid to
162 +|(% style="width:108px" %)Component|(% style="width:127px" %)Valid Value|(% style="width:150px" %)Valid from|(% style="width:185px" %)Valid to
163 163  |(% rowspan="3" style="width:108px" %)COUNTRY|(% style="width:127px" %)UK|(% style="width:150px" %) |(% style="width:185px" %)
164 164  |(% style="width:127px" %)FR|(% style="width:150px" %) |(% style="width:185px" %)
165 165  |(% style="width:127px" %)DE|(% style="width:150px" %) |(% style="width:185px" %)
166 166  
167 -Data (% style="color:#e74c3c" %)Constraint(%%) 1.1.0
167 +Data Constraint 1.1.0
168 168  
169 169  (% style="width:576.294px" %)
170 -|(% style="width:110px" %)[[Component>>doc:sdmx:Glossary.Component.WebHome]]|(% style="width:129px" %)Valid Value|(% style="width:145px" %)Valid from|(% style="width:189px" %)Valid to
170 +|(% style="width:110px" %)Component|(% style="width:129px" %)Valid Value|(% style="width:145px" %)Valid from|(% style="width:189px" %)Valid to
171 171  |(% rowspan="3" style="width:110px" %)COUNTRY|(% style="width:129px" %)UK|(% style="width:145px" %) |(% style="width:189px" %)
172 172  |(% style="width:129px" %)FR|(% style="width:145px" %) |(% style="width:189px" %)2012
173 173  |(% style="width:129px" %)DE|(% style="width:145px" %) |(% style="width:189px" %)
174 174  
175 -When both (% style="color:#e74c3c" %)versions(%%) of the Data (% style="color:#e74c3c" %)Constraint(%%) are in a system, an [[observation value>>doc:sdmx:Glossary.Observation value.WebHome]] reported against COUNTRY FR for [[time period>>doc:sdmx:Glossary.Time period.WebHome]] 2013 would be deemed invalid as the 1.1.0 rule would be applied.
175 +When both versions of the Data Constraint are in a system, an observation value reported against COUNTRY FR for time period 2013 would be deemed invalid as the 1.1.0 rule would be applied.
176 176  
177 177  === 10.4.6 Inheritance ===
178 178  
179 179  ==== 10.4.6.1 Attachment levels of a Constraint ====
180 180  
181 -There are three (% style="color:#e74c3c" %)levels(%%) of (% style="color:#e74c3c" %)constraint(%%) attachment for which these inheritance rules apply:
181 +There are three levels of constraint attachment for which these inheritance rules apply:
182 182  
183 -* [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]]/[[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] – top (% style="color:#e74c3c" %)level
184 -** [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]/[[Metadataflow>>doc:sdmx:Glossary.Metadataflow.WebHome]] – second (% style="color:#e74c3c" %)level
185 -*** [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] – third (% style="color:#e74c3c" %)level
183 +* DSD/MSD – top level
184 +** Dataflow/Metadataflow – second level
185 +*** Provision Agreement – third level
186 186  
187 -It is not necessary for a (% style="color:#e74c3c" %)Constraint(%%) to be attached to a higher (% style="color:#e74c3c" %)level(%%) [[artefact>>doc:sdmx:Glossary.Artefact.WebHome]]. e.g., it is valid to have a (% style="color:#e74c3c" %)Constraint(%%) for a [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] where there are no (% style="color:#e74c3c" %)constraints(%%) attached the relevant [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] or [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]].
187 +It is not necessary for a Constraint to be attached to a higher level artefact. e.g., it is valid to have a Constraint for a Provision Agreement where there are no constraints attached the relevant Dataflow or DSD.
188 188  
189 189  ==== 10.4.6.2 Cascade rules for processing Constraints ====
190 190  
191 -The processing of the (% style="color:#e74c3c" %)constraints(%%) on either [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]/[[Metadataflow>>doc:sdmx:Glossary.Metadataflow.WebHome]] or [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] must take into account the (% style="color:#e74c3c" %)constraints(%%) declared at higher (% style="color:#e74c3c" %)levels(%%). The rules for the lower-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)constraints(%%) (attached to [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]/ [[Metadataflow>>doc:sdmx:Glossary.Metadataflow.WebHome]] and [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]]) are detailed below.
191 +The processing of the constraints on either Dataflow/Metadataflow or Provision Agreement must take into account the constraints declared at higher levels. The rules for the lower-level constraints (attached to Dataflow/ Metadataflow and Provision Agreement) are detailed below.
192 192  
193 -Note that there can be a situation where a (% style="color:#e74c3c" %)constraint(%%) is specified at a lower (% style="color:#e74c3c" %)level(%%) before a (% style="color:#e74c3c" %)constraint(%%) is specified at a higher (% style="color:#e74c3c" %)level(%%). Therefore, it is possible that a higher-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)constraint(%%) makes a lower-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)constraint(%%) invalid. [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] makes no rules on how such a conflict should be handled when processing the (% style="color:#e74c3c" %)constraint(%%) for attachment. However, the cascade rules on evaluating (% style="color:#e74c3c" %)constraints(%%) for usage are clear – the higher-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)constraint(%%) takes precedence in any conflicts that result in a less restrictive specification at the lower (% style="color:#e74c3c" %)level(%%).
193 +Note that there can be a situation where a constraint is specified at a lower level before a constraint is specified at a higher level. Therefore, it is possible that a higher-level constraint makes a lower-level constraint invalid. SDMX makes no rules on how such a conflict should be handled when processing the constraint for attachment. However, the cascade rules on evaluating constraints for usage are clear – the higher-level constraint takes precedence in any conflicts that result in a less restrictive specification at the lower level.
194 194  
195 195  ==== 10.4.6.3 Cube Region ====
196 196  
197 -It is not necessary to have a (% style="color:#e74c3c" %)Constraint(%%) on the higher-(% style="color:#e74c3c" %)level(%%) [[artefact>>doc:sdmx:Glossary.Artefact.WebHome]] (e.g., [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] referenced by the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]), but if there is such a (% style="color:#e74c3c" %)Constraint(%%) at the higher (% style="color:#e74c3c" %)level(%%)(s) then:
197 +It is not necessary to have a Constraint on the higher-level artefact (e.g., DSD referenced by the Dataflow), but if there is such a Constraint at the higher level(s) then:
198 198  
199 -* The lower-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)Constraint(%%) cannot be less restrictive than the (% style="color:#e74c3c" %)Constraint(%%) specified for the same [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]] (e.g. [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]]) at the next higher (% style="color:#e74c3c" %)level(%%), which constrains that [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]]. For example, if the [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] FREQ is constrained to A, Q in a [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]], then the (% style="color:#e74c3c" %)Constraint(%%) at the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] or [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] cannot be A, Q, M or even just M – it can only further constrain A, Q.
200 -* The (% style="color:#e74c3c" %)Constraint(%%) at the lower (% style="color:#e74c3c" %)level(%%) for any one [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]] further constrains the content for the same [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]] at the higher (% style="color:#e74c3c" %)level(%%)(s).
201 -* Any [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]], which is not referenced in a (% style="color:#e74c3c" %)Constraint(%%), is deemed to be constrained according to the (% style="color:#e74c3c" %)Constraint(%%) specified at the next higher (% style="color:#e74c3c" %)level(%%) which (% style="color:#e74c3c" %)constraints(%%) that [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]].
202 -* If there is a conflict when resolving the (% style="color:#e74c3c" %)Constraint(%%) in terms of a lower-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)Constraint(%%) being less restrictive than a higher-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)Constraint(%%), then the (% style="color:#e74c3c" %)Constraint(%%) at the higher-(% style="color:#e74c3c" %)level(%%) is used.
199 +* The lower-level Constraint cannot be less restrictive than the Constraint specified for the same Member Selection (e.g. Dimension) at the next higher level, which constrains that Member Selection. For example, if the Dimension FREQ is constrained to A, Q in a DSD, then the Constraint at the Dataflow or Provision Agreement cannot be A, Q, M or even just M – it can only further constrain A, Q.
200 +* The Constraint at the lower level for any one Member Selection further constrains the content for the same Member Selection at the higher level(s).
201 +* Any Member Selection, which is not referenced in a Constraint, is deemed to be constrained according to the Constraint specified at the next higher level which constraints that Member Selection.
202 +* If there is a conflict when resolving the Constraint in terms of a lower-level Constraint being less restrictive than a higher-level Constraint, then the Constraint at the higher-level is used.
203 203  
204 -Note that it is possible for a (% style="color:#e74c3c" %)Constraint(%%) at a higher (% style="color:#e74c3c" %)level(%%) to constrain, say, four [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] in a single (% style="color:#e74c3c" %)Constraint(%%), and a (% style="color:#e74c3c" %)Constraint(%%) at a lower (% style="color:#e74c3c" %)level(%%) to constrain the same four in two, three, or four (% style="color:#e74c3c" %)Constraints(%%).
204 +Note that it is possible for a Constraint at a higher level to constrain, say, four Dimensions in a single Constraint, and a Constraint at a lower level to constrain the same four in two, three, or four Constraints.
205 205  
206 206  ==== 10.4.6.4 Key Set ====
207 207  
208 -It is not necessary to have a (% style="color:#e74c3c" %)Constraint(%%) on the higher-(% style="color:#e74c3c" %)level(%%) [[artefact>>doc:sdmx:Glossary.Artefact.WebHome]] (e.g., [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] referenced by the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]), but if there is such a (% style="color:#e74c3c" %)Constraint(%%) at the higher (% style="color:#e74c3c" %)level(%%)(s) then:
208 +It is not necessary to have a Constraint on the higher-level artefact (e.g., DSD referenced by the Dataflow), but if there is such a Constraint at the higher level(s) then:
209 209  
210 -* The lower-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)Constraint(%%) cannot be less restrictive than the (% style="color:#e74c3c" %)Constraint(%%) specified at the higher (% style="color:#e74c3c" %)level(%%).
211 -* The (% style="color:#e74c3c" %)Constraint(%%) at the lower (% style="color:#e74c3c" %)level(%%) for any one [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]] further constrains the keys specified at the higher (% style="color:#e74c3c" %)level(%%)(s).
212 -* Any [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]], which is not referenced in a (% style="color:#e74c3c" %)Constraint(%%), is deemed to be constrained according to the (% style="color:#e74c3c" %)Constraint(%%) specified at the next higher (% style="color:#e74c3c" %)level(%%) which (% style="color:#e74c3c" %)constraints(%%) that [[Member Selection>>doc:sdmx:Glossary.Member selection.WebHome]].
213 -* If there is a conflict when resolving the keys in the (% style="color:#e74c3c" %)Constraint(%%) at two (% style="color:#e74c3c" %)levels(%%), in terms of a lower-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)constraint(%%) being less restrictive than a higher-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)Constraint(%%), then the offending keys specified at the lower (% style="color:#e74c3c" %)level(%%) are not deemed part of the (% style="color:#e74c3c" %)Constraint(%%).
210 +* The lower-level Constraint cannot be less restrictive than the Constraint specified at the higher level.
211 +* The Constraint at the lower level for any one Member Selection further constrains the keys specified at the higher level(s).
212 +* Any Member Selection, which is not referenced in a Constraint, is deemed to be constrained according to the Constraint specified at the next higher level which constraints that Member Selection.
213 +* If there is a conflict when resolving the keys in the Constraint at two levels, in terms of a lower-level constraint being less restrictive than a higher-level Constraint, then the offending keys specified at the lower level are not deemed part of the Constraint.
214 214  
215 -Note that a Key in a Key Set can have wildcarded [[Components>>doc:sdmx:Glossary.Component.WebHome]]. For instance, the (% style="color:#e74c3c" %)Constraint(%%) may simply constrain the [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] FREQ to "A", and all keys where the FREQ="A" are therefore valid.
215 +Note that a Key in a Key Set can have wildcarded Components. For instance, the Constraint may simply constrain the Dimension FREQ to "A", and all keys where the FREQ="A" are therefore valid.
216 216  
217 217  The following logic explains how the inheritance mechanism works. Note that this is conceptual logic and actual systems may differ in the way this is implemented.
218 218  
219 -1. Determine all possible keys that are valid at the higher (% style="color:#e74c3c" %)level(%%).
220 -1. These keys are deemed to be inherited by the lower-(% style="color:#e74c3c" %)level(%%) constrained object, subject to the (% style="color:#e74c3c" %)Constraints(%%) specified at the lower (% style="color:#e74c3c" %)level(%%).
221 -1. Determine all possible keys that are possible using the (% style="color:#e74c3c" %)Constraints(%%) specified at the lower (% style="color:#e74c3c" %)level(%%).
222 -1. At the lower (% style="color:#e74c3c" %)level(%%) inherit all keys that match with the higher-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)Constraint(%%).
223 -1. If there are keys in the lower-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)Constraint(%%) that are not inherited then the key is invalid (i.e., it is less restrictive).
219 +1. Determine all possible keys that are valid at the higher level.
220 +1. These keys are deemed to be inherited by the lower-level constrained object, subject to the Constraints specified at the lower level.
221 +1. Determine all possible keys that are possible using the Constraints specified at the lower level.
222 +1. At the lower level inherit all keys that match with the higher-level Constraint.
223 +1. If there are keys in the lower-level Constraint that are not inherited then the key is invalid (i.e., it is less restrictive).
224 224  
225 225  === 10.4.7 Constraints Examples ===
226 226  
... ... @@ -228,21 +228,19 @@
228 228  
229 229  The following scenario is used.
230 230  
231 -A [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] contains the following [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]]:
231 +A DSD contains the following Dimensions:
232 232  
233 233  * GEO – Geography
234 -* [[SEX>>doc:sdmx:Glossary.Sex.WebHome]] – [[Sex>>doc:sdmx:Glossary.Sex.WebHome]]
235 -* [[AGE>>doc:sdmx:Glossary.Age.WebHome]] – [[Age>>doc:sdmx:Glossary.Age.WebHome]]
234 +* SEX – Sex
235 +* AGE – Age
236 236  * CAS – Current Activity Status
237 237  
238 -In the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]], common [[code lists>>doc:sdmx:Glossary.Code list.WebHome]] are used and the requirement is to restrict these at various (% style="color:#e74c3c" %)levels(%%) to specify the actual [[code>>doc:sdmx:Glossary.Code.WebHome]] that are valid for the object to which the (% style="color:#e74c3c" %)Constraint(%%) is attached.
238 +In the DSD, common code lists are used and the requirement is to restrict these at various levels to specify the actual code that are valid for the object to which the Constraint is attached.
239 239  
240 240  [[image:1750065279010-260.png]]
241 241  
242 -**Figure 20: Example Scenario for Constraints **
242 +**Figure 20: Example Scenario for Constraints **Constraints are declared as follows:
243 243  
244 -Constraints are declared as follows:
245 -
246 246  [[image:1750065319060-899.png]]
247 247  
248 248  **Figure 21: Example Constraints**
... ... @@ -249,38 +249,38 @@
249 249  
250 250  Notes:
251 251  
252 -[[AGE>>doc:sdmx:Glossary.Age.WebHome]] is constrained for the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] and is further restricted for the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] CENSUS_CUBE1.
250 +AGE is constrained for the DSD and is further restricted for the Dataflow CENSUS_CUBE1.
253 253  
254 -* The same (% style="color:#e74c3c" %)Constraint(%%) applies to both Provision Agreements.
252 +* The same Constraint applies to both Provision Agreements.
255 255  
256 256  The cascade rules elaborated above result as follows:
257 257  
258 -[[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]]
256 +DSD
259 259  
260 -* Constrained by eliminating [[code>>doc:sdmx:Glossary.Code.WebHome]] 001 from the [[code list>>doc:sdmx:Glossary.Code list.WebHome]] for the [[AGE>>doc:sdmx:Glossary.Age.WebHome]] [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]].
258 +* Constrained by eliminating code 001 from the code list for the AGE Dimension.
261 261  
262 -[[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] CENSUS_CUBE1
260 +Dataflow CENSUS_CUBE1
263 263  
264 -* Constrained by restricting the [[code list>>doc:sdmx:Glossary.Code list.WebHome]] for the [[AGE>>doc:sdmx:Glossary.Age.WebHome]] [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] to [[codes>>doc:sdmx:Glossary.Code.WebHome]] 002 and 003 (note that this is a more restrictive (% style="color:#e74c3c" %)constraint(%%) than that declared for the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] which specifies all [[codes>>doc:sdmx:Glossary.Code.WebHome]] except [[code>>doc:sdmx:Glossary.Code.WebHome]] 001).
265 -** Restricts the CAS [[codes>>doc:sdmx:Glossary.Code.WebHome]] to 003 and 004.
262 +* Constrained by restricting the code list for the AGE Dimension to codes 002 and 003 (note that this is a more restrictive constraint than that declared for the DSD which specifies all codes except code 001).
263 +** Restricts the CAS codes to 003 and 004.
266 266  
267 -[[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] CENSUS_CUBE2
265 +Dataflow CENSUS_CUBE2
268 268  
269 -* Restricts the [[code list>>doc:sdmx:Glossary.Code list.WebHome]] for the CAS [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] to [[codes>>doc:sdmx:Glossary.Code.WebHome]] TOT and NAP.
270 -** Inherits the [[AGE>>doc:sdmx:Glossary.Age.WebHome]] (% style="color:#e74c3c" %)constraint(%%) applied at the (% style="color:#e74c3c" %)level(%%) of the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]].
267 +* Restricts the code list for the CAS Dimension to codes TOT and NAP.
268 +** Inherits the AGE constraint applied at the level of the DSD.
271 271  
272 -[[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] CENSUS_CUBE1_IT
270 +Provision Agreement CENSUS_CUBE1_IT
273 273  
274 -* Restricts the [[codes>>doc:sdmx:Glossary.Code.WebHome]] for the GEO [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] to IT and its children.
275 -** Inherits the (% style="color:#e74c3c" %)constraints(%%) from [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] CENSUS_CUBE1 for the [[AGE>>doc:sdmx:Glossary.Age.WebHome]] and CAS [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]].
272 +* Restricts the codes for the GEO Dimension to IT and its children.
273 +** Inherits the constraints from Dataflow CENSUS_CUBE1 for the AGE and CAS Dimensions.
276 276  
277 -[[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] CENSUS_CUBE2_IT
275 +Provision Agreement CENSUS_CUBE2_IT
278 278  
279 -* Restricts the [[codes>>doc:sdmx:Glossary.Code.WebHome]] for the GEO [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] to IT and its children.
280 -** Inherits the (% style="color:#e74c3c" %)constraints(%%) from [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] CENSUS_CUBE2 for the CAS [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]].
281 -** Inherits the [[AGE>>doc:sdmx:Glossary.Age.WebHome]] (% style="color:#e74c3c" %)constraint(%%) applied at the (% style="color:#e74c3c" %)level(%%) of the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]].
277 +* Restricts the codes for the GEO Dimension to IT and its children.
278 +** Inherits the constraints from Dataflow CENSUS_CUBE2 for the CAS Dimension.
279 +** Inherits the AGE constraint applied at the level of the DSD.
282 282  
283 -The (% style="color:#e74c3c" %)Constraints(%%) are defined as follows:
281 +The Constraints are defined as follows:
284 284  
285 285  DSD Constraint
286 286  
... ... @@ -298,20 +298,20 @@
298 298  
299 299  The possible combination of constraining terms are explained in this section, following a few examples.
300 300  
301 -Let’s assume a [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] with the following [[Components>>doc:sdmx:Glossary.Component.WebHome]]:
299 +Let’s assume a DSD with the following Components:
302 302  
303 303  (% style="width:459.294px" %)
304 -|(% style="width:204px" %)(% style="color:#3498db" %)[[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]]|(% style="width:252px" %)(% style="color:#3498db" %)FREQ
305 -|(% style="width:204px" %)(% style="color:#3498db" %)[[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]]|(% style="width:252px" %)(% style="color:#3498db" %)JD_TYPE
306 -|(% style="width:204px" %)(% style="color:#3498db" %)[[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]]|(% style="width:252px" %)(% style="color:#3498db" %)JD_CATEGORY
307 -|(% style="width:204px" %)(% style="color:#3498db" %)[[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]]|(% style="width:252px" %)(% style="color:#3498db" %)VIS_CTY
302 +|(% style="width:204px" %)(% style="color:#3498db" %)Dimension|(% style="width:252px" %)(% style="color:#3498db" %)FREQ
303 +|(% style="width:204px" %)(% style="color:#3498db" %)Dimension|(% style="width:252px" %)(% style="color:#3498db" %)JD_TYPE
304 +|(% style="width:204px" %)(% style="color:#3498db" %)Dimension|(% style="width:252px" %)(% style="color:#3498db" %)JD_CATEGORY
305 +|(% style="width:204px" %)(% style="color:#3498db" %)Dimension|(% style="width:252px" %)(% style="color:#3498db" %)VIS_CTY
308 308  |(% style="width:204px" %)(% style="color:#2980b9" %)TimeDimension|(% style="width:252px" %)(% style="color:#2980b9" %)TIME_PERIOD
309 -|(% style="width:204px" %)(% style="color:#16a085" %)[[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]]|(% style="width:252px" %)(% style="color:#16a085" %)OBS_STATUS
310 -|(% style="width:204px" %)(% style="color:#16a085" %)[[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]]|(% style="width:252px" %)(% style="color:#16a085" %)UNIT
311 -|(% style="width:204px" %)(% style="color:#16a085" %)[[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]]|(% style="width:252px" %)(% style="color:#16a085" %)[[COMMENT>>doc:sdmx:Glossary.Comment.WebHome]]
312 -|(% style="width:204px" %)(% style="color:#f39c12" %)MetadataAttribute|(% style="width:252px" %)(% style="color: rgb(243, 156, 18); color: rgb(231, 76, 60)" %)CONTACT
313 -|(% style="width:204px" %)(% style="color:#e74c3c" %)[[Measure>>doc:sdmx:Glossary.Measure.WebHome]]|(% style="width:252px" %)(% style="color:#e74c3c" %)MULTISELECT
314 -|(% style="width:204px" %)(% style="color:#e74c3c" %)[[Measure>>doc:sdmx:Glossary.Measure.WebHome]]|(% style="width:252px" %)(% style="color:#e74c3c" %)CHOICE
307 +|(% style="width:204px" %)(% style="color:#16a085" %)Attribute|(% style="width:252px" %)(% style="color:#16a085" %)OBS_STATUS
308 +|(% style="width:204px" %)(% style="color:#16a085" %)Attribute|(% style="width:252px" %)(% style="color:#16a085" %)UNIT
309 +|(% style="width:204px" %)(% style="color:#16a085" %)Attribute|(% style="width:252px" %)(% style="color:#16a085" %)COMMENT
310 +|(% style="width:204px" %)(% style="color:#f39c12" %)MetadataAttribute|(% style="width:252px" %)(% style="color:#f39c12" %)CONTACT
311 +|(% style="width:204px" %)(% style="color:#e74c3c" %)Measure|(% style="width:252px" %)(% style="color:#e74c3c" %)MULTISELECT
312 +|(% style="width:204px" %)(% style="color:#e74c3c" %)Measure|(% style="width:252px" %)(% style="color:#e74c3c" %)CHOICE
315 315  
316 316  On the above, let’s assume the following use cases with their constraining requirements:
317 317  
... ... @@ -386,9 +386,9 @@
386 386  |(% style="width:137px" %)(% style="color:#2980b9" %)VIS_CTY|(% style="width:183px" %)(% style="color:#2980b9" %)MX, DE
387 387  |(% style="width:137px" %)(% style="color:#27ae60" %)OBS_STATUS|(% style="width:183px" %)(% style="color:#27ae60" %)F
388 388  
389 -The problem with this approach is that according to the business rule for (% style="color:#e74c3c" %)Constraints(%%), only one should be specified per [[Component>>doc:sdmx:Glossary.Component.WebHome]]. Thus, if a software would perform some conflict resolution would end up with empty sets for FREQ and OBS_STATUS (as they do not share any values).
387 +The problem with this approach is that according to the business rule for Constraints, only one should be specified per Component. Thus, if a software would perform some conflict resolution would end up with empty sets for FREQ and OBS_STATUS (as they do not share any values).
390 390  
391 -Nevertheless, there is a much easier approach to that; this is the cascading mechanism of (% style="color:#e74c3c" %)Constraints(%%) (as shown in 10.4.7.1). Hence, these rules would be expressed into two (% style="color:#e74c3c" %)levels(%%) of (% style="color:#e74c3c" %)Constraints(%%), e.g., [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] and [[Dataflows>>doc:sdmx:Glossary.Dataflow.WebHome]]:
389 +Nevertheless, there is a much easier approach to that; this is the cascading mechanism of Constraints (as shown in 10.4.7.1). Hence, these rules would be expressed into two levels of Constraints, e.g., DSD and Dataflows:
392 392  
393 393  DSD CubeRegion:
394 394  
... ... @@ -413,24 +413,21 @@
413 413  
414 414  **Use case 6: A Constraint on allowed values for some Dimensions combined with allowed values for Measures**
415 415  
416 -R1: Allow monthly data, for Germany, with unit euro, and [[measure>>doc:sdmx:Glossary.Measure.WebHome]] choice is  'A' R2: Allow quarterly data, for Mexico, with unit usd, and [[measure>>doc:sdmx:Glossary.Measure.WebHome]] choice is  'B'
414 +R1: Allow monthly data, for Germany, with unit euro, and measure choice is  'A' R2: Allow quarterly data, for Mexico, with unit usd, and measure choice is  'B'
417 417  
418 418  This may be expressed with the following DataKeySet:
419 419  
420 -(% style="width:404.294px" %)
421 -|(% rowspan="4" style="width:99px" %)(% style="color:#2980b9" %)Key1|(% style="width:153px" %)(% style="color:#2980b9" %)FREQ|(% style="width:149px" %)(% style="color:#2980b9" %)M
422 -|(% style="width:153px" %)(% style="color:#2980b9" %)VIS_CTY|(% style="width:149px" %)(% style="color:#2980b9" %)DE
423 -|(% style="width:153px" %)(% style="color:#27ae60" %)UNIT|(% style="width:149px" %)(% style="color:#27ae60" %)EUR
424 -|(% style="width:153px" %)(% style="color:#e74c3c" %)CHOICE|(% style="width:149px" %)(% style="color:#e74c3c" %)A
425 -|(% rowspan="4" style="width:99px" %)(% style="color:#2980b9" %)Key2|(% style="width:153px" %)(% style="color:#2980b9" %)FREQ|(% style="width:149px" %)(% style="color:#2980b9" %)Q
426 -|(% style="width:153px" %)(% style="color:#2980b9" %)VIS_CTY|(% style="width:149px" %)(% style="color:#2980b9" %)MX
427 -|(% style="width:153px" %)(% style="color:#27ae60" %)UNIT|(% style="width:149px" %)(% style="color:#27ae60" %)USD
428 -|(% style="width:153px" %)(% style="color:#e74c3c" %)CHOICE|(% style="width:149px" %)(% style="color:#e74c3c" %)B
418 +|(% rowspan="4" %)Key1|FREQ|M
419 +|VIS_CTY|DE
420 +|UNIT|EUR
421 +|CHOICE|A
422 +|(% rowspan="4" %)Key2|FREQ|Q
423 +|VIS_CTY|MX
424 +|UNIT|USD
425 +|CHOICE|B
429 429  
430 -**Use Case 7: A Constraint with wildcards for Codes and removePrefix property**
427 +**Use Case 7: A Constraint with wildcards for Codes and removePrefix property** For this example, we assume that the VIS_CTY representation has been prefixed with prefix ‘AREA_’. In this Constraint, we need to remove the prefix.
431 431  
432 -For this example, we assume that the VIS_CTY representation has been prefixed with prefix ‘AREA_’. In this Constraint, we need to remove the prefix.
433 -
434 434  R1: Allow monthly and quarterly data
435 435  
436 436  R2: Allow vis-à-vis countries that start with M
... ... @@ -439,9 +439,8 @@
439 439  
440 440  This may be expressed with the following CubeRegion:
441 441  
442 -(% style="width:379.294px" %)
443 -|(% style="width:264px" %)(% style="color:#2980b9" %)FREQ|(% style="width:112px" %)(% style="color:#2980b9" %)M, Q
444 -|(% style="width:264px" %)(% style="color:#2980b9" %)VIS_CTY (removePrefix=’AREA_’)|(% style="width:112px" %)(% style="color:#2980b9" %)M%
437 +|FREQ|M, Q
438 +|VIS_CTY (removePrefix=’AREA_’)|M%
445 445  
446 446  **Use Case 8: A Constraint with multilingual support on Attributes**
447 447  
... ... @@ -449,24 +449,22 @@
449 449  
450 450  R2: Allow Mexico for vis-à-vis country
451 451  
452 -R3: Allow a [[comment>>doc:sdmx:Glossary.Comment.WebHome]], in English, which includes the term adjusted for status
446 +R3: Allow a comment, in English, which includes the term adjusted for status
453 453  
454 454  This may be expressed with the following CubeRegion:
455 455  
456 -(% style="width:382.294px" %)
457 -|(% style="width:190px" %)(% style="color:#2980b9" %)FREQ|(% style="width:189px" %)(% style="color:#2980b9" %)M, Q
458 -|(% style="width:190px" %)(% style="color:#2980b9" %)VIS_CTY|(% style="width:189px" %)(% style="color:#2980b9" %)MX
459 -|(% style="width:190px" %)(% style="color:#27ae60" %)[[COMMENT>>doc:sdmx:Glossary.Comment.WebHome]] (lang=’en’)|(% style="width:189px" %)(% style="color:#27ae60" %)%adjusted%
450 +|FREQ|M, Q
451 +|VIS_CTY|MX
452 +|COMMENT (lang=’en’)|%adjusted%
460 460  
461 461  **Use Case 9: A Constraint on allowed values for Dimensions combined with allowed** values for Metadata Attributes R1: Allow monthly and quarterly data
462 462  
463 463  R2: Allow Mexico for vis-à-vis country
464 464  
465 -R3: Allow John Doe for (% style="color:#e74c3c" %)contact(%%)
458 +R3: Allow John Doe for contact
466 466  
467 467  This may be expressed with the following CubeRegion:
468 468  
469 -(% style="width:388.294px" %)
470 -|(% style="width:181px" %)(% style="color:#2980b9" %)FREQ|(% style="width:204px" %)(% style="color:#2980b9" %)M, Q
471 -|(% style="width:181px" %)(% style="color:#2980b9" %)VIS_CTY|(% style="width:204px" %)(% style="color:#2980b9" %)MX
472 -|(% style="width:181px" %)(% style="color:#f39c12" %)CONTACT|(% style="width:204px" %)(% style="color:#f39c12" %)John Doe
462 +|FREQ|M, Q
463 +|VIS_CTY|MX
464 +|CONTACT|John Doe
SUZ.Methodology.Code.MethodologyClass[0]
index
... ... @@ -1,1 +1,0 @@
1 -10