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Version 22.2 by Helena K. on 2025/05/23 10:10
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Helena K. 14.1 1 {{box title="**Contents**"}}
2 {{toc/}}
3 {{/box}}
Helena K. 2.1 4
5 == 10.1 Introduction ==
6
Artur K. 22.1 7 A (% style="color:#e74c3c" %)Constraint(%%) is a [[Maintainable Artefact>>doc:Glossary.Maintainable artefact.WebHome]] that can be associated to one or more of:
Helena K. 2.1 8
9 * Data Structure Definition
10 * Metadata Structure Definition
Artur K. 22.1 11 * [[Dataflow>>doc:Glossary.Dataflow.WebHome]]
12 * [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]]
13 * [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]]
14 * Metadata [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]]
15 * [[Data Provider>>doc:Glossary.Data provider.WebHome]] or Metadata Provider (this is restricted to a [[Release Calendar>>doc:Glossary.Release policy - release calendar.WebHome]] (% style="color:#e74c3c" %)Constraint(%%))
Helena K. 2.1 16 * Simple or Queryable Data Sources
17 * Dataset
18 * Metadataset
19
Artur K. 22.1 20 Note that regardless of the [[Artefact>>doc:Glossary.Artefact.WebHome]] to which the (% style="color:#e74c3c" %)Constraint(%%) is associated, it is constraining the contents of [[code lists>>doc:Glossary.Code list.WebHome]] in the [[DSD>>doc:Glossary.Data structure definition.WebHome]] to which the constrained object is related. This does not apply, of course, to a Metadata/[[Data Provider>>doc:Glossary.Data provider.WebHome]] as the latter can be associated, via the (Metadata) [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]], to many MSDs/DSDs. Hence the reason for the restriction on the type of (% style="color:#e74c3c" %)Constraint(%%) that can be attached to a Metadata/[[Data Provider>>doc:Glossary.Data provider.WebHome]].
Helena K. 2.1 21
22 == 10.2 Types of Constraint ==
23
Artur K. 21.1 24 The (% style="color:#e74c3c" %)Constraint(%%) can be of one of two types:
Helena K. 2.1 25
Artur K. 21.1 26 * Data (% style="color:#e74c3c" %)constraint
27 * Metadata (% style="color:#e74c3c" %)constraint
Helena K. 2.1 28
Artur K. 21.1 29 The Data (% style="color:#e74c3c" %)Constraint(%%) may serve two different perspectives, depending on the way the latter is retrieved. These are:
Helena K. 2.1 30
Artur K. 21.1 31 * Allowed (% style="color:#e74c3c" %)constraint
32 * Actual (% style="color:#e74c3c" %)constraint
Helena K. 2.1 33
Artur K. 22.1 34 The former (allowed – also valid for Metadata (% style="color:#e74c3c" %)Constraint(%%)) is specified by a data or metadata provider or consumer for sharing the allowed data and metadata in the context of their [[DSD>>doc:Glossary.Data structure definition.WebHome]] or [[MSD>>doc:Glossary.Metadata structure definition.WebHome]] exchanges, e.g., only Monthly data for a specific [[Dataflow>>doc:Glossary.Dataflow.WebHome]]. The latter (actual) is a dynamic (% style="color:#e74c3c" %)Constraint(%%) in response to an availability request (only possible for data).
Helena K. 2.1 35
Artur K. 21.1 36 For Actual Data (% style="color:#e74c3c" %)Constraints(%%), there a few characteristics that are worth noting:
Helena K. 2.1 37
38 * They can only be retrieved by the availability requests (as specified in the REST API).
Artur K. 22.1 39 * They depend on the data available in an [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] Web Service and thus they can only be dynamically generated according to that data.
40 * Although they are [[Maintainable Artefacts>>doc:Glossary.Maintainable artefact.WebHome]], they cannot change independently of data; thus, they cannot be versioned (they are non-versioned, as explained in section 14).
Helena K. 2.1 41 * Their identifier may also be dynamically generated and thus there is no REST resource based on their identification.
42
43 == 10.3 Rules for a Constraint ==
44
45 === 10.3.1 Scope of a Constraint ===
46
Artur K. 22.1 47 A (% style="color:#e74c3c" %)Constraint(%%) is used specify the content of a data or metadata source in terms of the [[component>>doc:Glossary.Component.WebHome]] values or the keys.
Helena K. 2.1 48
Artur K. 22.1 49 In terms of data the [[components>>doc:Glossary.Component.WebHome]] are:
Helena K. 2.1 50
Artur K. 22.1 51 * [[Dimension>>doc:Glossary.Dimension.WebHome]]
52 * Time [[Dimension>>doc:Glossary.Dimension.WebHome]]
53 * Data [[Attribute>>doc:Glossary.Attribute.WebHome]]
54 * [[Measure>>doc:Glossary.Measure.WebHome]]
55 * Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]]
56 * DataKeySets: the keys are the content of the KeyDescriptor – i.e., the [[series keys>>doc:Glossary.Series key.WebHome]] composed, for each key, by a value for each [[Dimension>>doc:Glossary.Dimension.WebHome]].
Helena K. 2.1 57
Artur K. 22.1 58 In terms of [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] the [[components>>doc:Glossary.Component.WebHome]] are:
Helena K. 2.1 59
Artur K. 22.1 60 * Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]]
Helena K. 2.1 61
Artur K. 22.1 62 For a (% style="color:#e74c3c" %)Constraint(%%) based on a [[DSD>>doc:Glossary.Data structure definition.WebHome]] the (% style="color:#e74c3c" %)Constraint(%%) can reference one or more of:
Helena K. 2.1 63
64 * Data Structure Definition
Artur K. 22.1 65 * [[Dataflow>>doc:Glossary.Dataflow.WebHome]]
66 * [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]]
67 * [[Data Provider>>doc:Glossary.Data provider.WebHome]]
Helena K. 2.1 68
Artur K. 22.1 69 For a (% style="color:#e74c3c" %)Constraint(%%) based on an [[MSD>>doc:Glossary.Metadata structure definition.WebHome]] the (% style="color:#e74c3c" %)Constraint(%%) can reference one or more of:
Helena K. 2.1 70
71 * Metadata Structure Definition
Artur K. 22.1 72 * [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]]
73 * Metadata [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]]
Helena K. 2.1 74 * Metadata Provider
75 * Metadata Set
76
Artur K. 22.1 77 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:Glossary.Data structure definition.WebHome]].
Helena K. 2.1 78
Artur K. 21.1 79 In view of the flexibility of (% style="color:#e74c3c" %)constraints(%%) attachment, clear rules on their usage are required. These are elaborated below.
Helena K. 2.1 80
81 === 10.3.2 Multiple Constraints ===
82
Artur K. 22.1 83 There can be many (% style="color:#e74c3c" %)Constraints(%%) for any Constrainable [[Artefact>>doc:Glossary.Artefact.WebHome]] (e.g., [[DSD>>doc:Glossary.Data structure definition.WebHome]]), subject to the following restrictions:
Helena K. 2.1 84
Helena K. 14.1 85 ==== 10.3.2.1 Cube Region ====
Helena K. 2.1 86
Artur K. 22.1 87 A (% style="color:#e74c3c" %)Constraint(%%) can contain multiple [[Member Selections>>doc:Glossary.Member selection.WebHome]] (e.g., [[Dimensions>>doc:Glossary.Dimension.WebHome]]).
Helena K. 2.1 88
Artur K. 22.1 89 * A specific [[Member Selection>>doc:Glossary.Member selection.WebHome]] (e.g., [[Dimension>>doc:Glossary.Dimension.WebHome]] FREQ) can only be contained in one Cube Region for any one attached object (e.g., a specific [[DSD>>doc:Glossary.Data structure definition.WebHome]] or specific [[Dataflow>>doc:Glossary.Dataflow.WebHome]]).
90 * [[Component>>doc:Glossary.Component.WebHome]] values within a [[Member Selection>>doc:Glossary.Member selection.WebHome]] may define a validity period. Otherwise, the value is valid for the whole validity of the Cube Region.
91 * For partial reference resolution purposes (as per the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] REST API), the latest non-draft (% style="color:#e74c3c" %)Constraint(%%) must be considered.
92 * A [[Member Selection>>doc: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.
93 * Any values included in a [[Member Selection>>doc:Glossary.Member selection.WebHome]] for [[Components>>doc:Glossary.Component.WebHome]] with an array data type (i.e., [[Measures>>doc:Glossary.Measure.WebHome]], [[Attributes>>doc:Glossary.Attribute.WebHome]] or Metadata [[Attributes>>doc: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:Glossary.Code.WebHome]] ‘A’ for an [[Attribute>>doc:Glossary.Attribute.WebHome]] will allow any instance of the [[Attribute>>doc:Glossary.Attribute.WebHome]] that includes ‘A’, like [‘A’, ‘B’] or [‘A’, ‘C’, ‘D’]. Similarly, if [[Code>>doc:Glossary.Code.WebHome]] ‘A’ was excluded, all those arrays of values would also be excluded.
Helena K. 2.1 94
Helena K. 14.1 95 ==== 10.3.2.2 Key Set ====
Helena K. 2.1 96
Artur K. 21.1 97 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").
Helena K. 2.1 98
Artur K. 22.1 99 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:Glossary.Series key.WebHome]]. This will minimize the risk that keys are inadvertently included or excluded.
Helena K. 2.1 100
Artur K. 22.1 101 In addition, [[Attribute>>doc:Glossary.Attribute.WebHome]], [[Measure>>doc:Glossary.Measure.WebHome]] and Metadata [[Attribute>>doc: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.
Helena K. 2.1 102
103 Finally, a validity period may be specified per Key.
104
105 === 10.3.3 Inheritance of a Constraint ===
106
Helena K. 14.1 107 ==== 10.3.3.1 Attachment levels of a Constraint ====
Helena K. 2.1 108
Artur K. 21.1 109 There are three (% style="color:#e74c3c" %)levels(%%) of (% style="color:#e74c3c" %)constraint(%%) attachment for which these inheritance rules apply:
Helena K. 2.1 110
Artur K. 22.1 111 • [[DSD>>doc:Glossary.Data structure definition.WebHome]]/[[MSD>>doc:Glossary.Metadata structure definition.WebHome]] – top (% style="color:#e74c3c" %)level(%%) o [[Dataflow>>doc:Glossary.Dataflow.WebHome]]/[[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] – second (% style="color:#e74c3c" %)level
Helena K. 2.1 112
Artur K. 22.1 113 ▪ [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]] – third (% style="color:#e74c3c" %)level
Helena K. 2.1 114
Artur K. 22.1 115 Note that these rules do not apply to the Simple Datasource or Queryable Datasource; the (% style="color:#e74c3c" %)Constraint(%%)(s) attached to these [[artefacts>>doc:Glossary.Artefact.WebHome]] are resolved for this [[artefact>>doc:Glossary.Artefact.WebHome]] only and do not take into account (% style="color:#e74c3c" %)Constraints(%%) attached to other [[artefacts>>doc:Glossary.Artefact.WebHome]] (e.g., [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]], [[Dataflow>>doc:Glossary.Dataflow.WebHome]], [[DSD>>doc:Glossary.Data structure definition.WebHome]]).
Helena K. 2.1 116
Artur K. 22.1 117 It is not necessary for a (% style="color:#e74c3c" %)Constraint(%%) to be attached to a higher (% style="color:#e74c3c" %)level(%%) [[artefact>>doc:Glossary.Artefact.WebHome]]. e.g., it is valid to have a (% style="color:#e74c3c" %)Constraint(%%) for a [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]] where there are no (% style="color:#e74c3c" %)constraints(%%) attached the relevant [[dataflow>>doc:Glossary.Dataflow.WebHome]] or [[DSD>>doc:Glossary.Data structure definition.WebHome]].
Helena K. 2.1 118
Helena K. 14.1 119 ==== 10.3.3.2 Cascade rules for processing Constraints ====
Helena K. 2.1 120
Artur K. 22.1 121 The processing of the (% style="color:#e74c3c" %)constraints(%%) on either [[Dataflow>>doc:Glossary.Dataflow.WebHome]]/[[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] or [[Provision Agreement>>doc: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:Glossary.Dataflow.WebHome]]/ [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] and [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]]) are detailed below.
Helena K. 2.1 122
Artur K. 22.1 123 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: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(%%).
Helena K. 2.1 124
Helena K. 14.1 125 ==== 10.3.3.3 Cube Region ====
Helena K. 2.1 126
Artur K. 22.1 127 It is not necessary to have a (% style="color:#e74c3c" %)Constraint(%%) on the higher-(% style="color:#e74c3c" %)level(%%) [[artefact>>doc:Glossary.Artefact.WebHome]] (e.g., [[DSD>>doc:Glossary.Data structure definition.WebHome]] referenced by the [[Dataflow>>doc:Glossary.Dataflow.WebHome]]), but if there is such a (% style="color:#e74c3c" %)Constraint(%%) at the higher (% style="color:#e74c3c" %)level(%%)(s) then:
Helena K. 2.1 128
Artur K. 22.1 129 * 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:Glossary.Member selection.WebHome]] (e.g. [[Dimension>>doc:Glossary.Dimension.WebHome]]) at the next higher (% style="color:#e74c3c" %)level(%%), which constrains that [[Member Selection>>doc:Glossary.Member selection.WebHome]]. For example, if the [[Dimension>>doc:Glossary.Dimension.WebHome]] FREQ is constrained to A, Q in a [[DSD>>doc:Glossary.Data structure definition.WebHome]], then the (% style="color:#e74c3c" %)Constraint(%%) at the [[Dataflow>>doc:Glossary.Dataflow.WebHome]] or [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]] cannot be A, Q, M or even just M – it can only further constrain A, Q.
130 * The (% style="color:#e74c3c" %)Constraint(%%) at the lower (% style="color:#e74c3c" %)level(%%) for any one [[Member Selection>>doc:Glossary.Member selection.WebHome]] further constrains the content for the same [[Member Selection>>doc:Glossary.Member selection.WebHome]] at the higher (% style="color:#e74c3c" %)level(%%)(s).
131 * Any [[Member Selection>>doc: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:Glossary.Member selection.WebHome]].
Artur K. 21.1 132 * 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.
Helena K. 2.1 133
Artur K. 22.1 134 Note that it is possible for a (% style="color:#e74c3c" %)Constraint(%%) at a higher (% style="color:#e74c3c" %)level(%%) to constrain, say, four [[Dimensions>>doc: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(%%).
Helena K. 2.1 135
Helena K. 14.1 136 ==== 10.3.3.4 Key Set ====
Helena K. 2.1 137
Artur K. 22.1 138 It is not necessary to have a (% style="color:#e74c3c" %)Constraint(%%) on the higher-(% style="color:#e74c3c" %)level(%%) [[artefact>>doc:Glossary.Artefact.WebHome]] (e.g., [[DSD>>doc:Glossary.Data structure definition.WebHome]] referenced by the [[Dataflow>>doc:Glossary.Dataflow.WebHome]]), but if there is such a (% style="color:#e74c3c" %)Constraint(%%) at the higher (% style="color:#e74c3c" %)level(%%)(s) then:
Helena K. 2.1 139
Artur K. 21.1 140 * 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(%%).
Artur K. 22.1 141 * The (% style="color:#e74c3c" %)Constraint(%%) at the lower (% style="color:#e74c3c" %)level(%%) for any one [[Member Selection>>doc:Glossary.Member selection.WebHome]] further constrains the keys specified at the higher (% style="color:#e74c3c" %)level(%%)(s).
142 * Any [[Member Selection>>doc: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:Glossary.Member selection.WebHome]].
Artur K. 21.1 143 * 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(%%).
Helena K. 2.1 144
Artur K. 22.1 145 Note that a Key in a Key Set can have wildcarded [[Components>>doc:Glossary.Component.WebHome]]. For instance, the (% style="color:#e74c3c" %)Constraint(%%) may simply constrain the [[Dimension>>doc:Glossary.Dimension.WebHome]] FREQ to "A", and all keys where the FREQ="A" are therefore valid.
Helena K. 2.1 146
147 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.
148
Helena K. 22.2 149 *
Artur K. 21.1 150 *1. Determine all possible keys that are valid at the higher (% style="color:#e74c3c" %)level(%%).
151 *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(%%).
152 *1. Determine all possible keys that are possible using the (% style="color:#e74c3c" %)Constraints(%%) specified at the lower (% style="color:#e74c3c" %)level(%%).
153 *1. At the lower (% style="color:#e74c3c" %)level(%%) inherit all keys that match with the higher-(% style="color:#e74c3c" %)level(%%) (% style="color:#e74c3c" %)Constraint(%%).
154 *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).
Helena K. 2.1 155
156 === 10.3.4 Constraints Examples ===
157
Helena K. 14.2 158 ==== 10.3.4.1 Data Constraint and Cascading ====
Helena K. 2.1 159
Helena K. 14.1 160 The following scenario is used.
161
Artur K. 22.1 162 A [[DSD>>doc:Glossary.Data structure definition.WebHome]] contains the following [[Dimensions>>doc:Glossary.Dimension.WebHome]]:
Helena K. 2.1 163
164 * GEO – Geography
165 * SEX – Sex
166 * AGE – Age
167 * CAS – Current Activity Status
168
Artur K. 22.1 169 In the [[DSD>>doc:Glossary.Data structure definition.WebHome]], common [[code lists>>doc: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:Glossary.Code.WebHome]] that are valid for the object to which the (% style="color:#e74c3c" %)Constraint(%%) is attached.
Helena K. 2.1 170
171 [[image:SDMX 3-0-0 SECTION 6 FINAL-1.0_en_77bea5e.png||height="344" width="554"]]
172
Helena K. 14.1 173 **Figure 20: Example Scenario for Constraints **
Helena K. 2.1 174
Helena K. 14.1 175 Constraints are declared as follows:
176
Helena K. 2.1 177 [[image:SDMX 3-0-0 SECTION 6 FINAL-1.0_en_7c36c475.png||height="356" width="541"]]
178
179 **Figure 21: Example Constraints**
180
181 Notes:
182
Artur K. 22.1 183 [[AGE>>doc:Glossary.Age.WebHome]] is constrained for the [[DSD>>doc:Glossary.Data structure definition.WebHome]] and is further restricted for the [[Dataflow>>doc:Glossary.Dataflow.WebHome]] CENSUS_CUBE1.
Helena K. 2.1 184
Artur K. 21.1 185 * The same (% style="color:#e74c3c" %)Constraint(%%) applies to both Provision Agreements.
Helena K. 2.1 186
187 The cascade rules elaborated above result as follows:
188
Artur K. 22.1 189 [[DSD>>doc:Glossary.Data structure definition.WebHome]]
Helena K. 2.1 190
Artur K. 22.1 191 * Constrained by eliminating [[code>>doc:Glossary.Code.WebHome]] 001 from the [[code list>>doc:Glossary.Code list.WebHome]] for the [[AGE>>doc:Glossary.Age.WebHome]] [[Dimension>>doc:Glossary.Dimension.WebHome]].
Helena K. 2.1 192
Artur K. 22.1 193 [[Dataflow>>doc:Glossary.Dataflow.WebHome]] CENSUS_CUBE1
Helena K. 2.1 194
Artur K. 22.1 195 * Constrained by restricting the [[code list>>doc:Glossary.Code list.WebHome]] for the [[AGE>>doc:Glossary.Age.WebHome]] [[Dimension>>doc:Glossary.Dimension.WebHome]] to [[codes>>doc:Glossary.Code.WebHome]] 002 and 003 (note that this is a more restrictive (% style="color:#e74c3c" %)constraint(%%) than that declared for the [[DSD>>doc:Glossary.Data structure definition.WebHome]] which specifies all [[codes>>doc:Glossary.Code.WebHome]] except [[code>>doc:Glossary.Code.WebHome]] 001).
196 ** Restricts the CAS [[codes>>doc:Glossary.Code.WebHome]] to 003 and 004.
Helena K. 2.1 197
Artur K. 22.1 198 [[Dataflow>>doc:Glossary.Dataflow.WebHome]] CENSUS_CUBE2
Helena K. 2.1 199
Artur K. 22.1 200 * Restricts the [[code list>>doc:Glossary.Code list.WebHome]] for the CAS [[Dimension>>doc:Glossary.Dimension.WebHome]] to [[codes>>doc:Glossary.Code.WebHome]] TOT and NAP.
201 ** Inherits the [[AGE>>doc:Glossary.Age.WebHome]] (% style="color:#e74c3c" %)constraint(%%) applied at the (% style="color:#e74c3c" %)level(%%) of the [[DSD>>doc:Glossary.Data structure definition.WebHome]].
Helena K. 2.1 202
203 Provision Agreement CENSUS_CUBE1_IT
204
Artur K. 22.1 205 * Restricts the [[codes>>doc:Glossary.Code.WebHome]] for the GEO [[Dimension>>doc:Glossary.Dimension.WebHome]] to IT and its children.
206 ** Inherits the (% style="color:#e74c3c" %)constraints(%%) from [[Dataflow>>doc:Glossary.Dataflow.WebHome]] CENSUS_CUBE1 for the [[AGE>>doc:Glossary.Age.WebHome]] and CAS Dimensions.
Helena K. 2.1 207
208 Provision Agreement CENSUS_CUBE2_IT
209
Artur K. 22.1 210 * Restricts the [[codes>>doc:Glossary.Code.WebHome]] for the GEO [[Dimension>>doc:Glossary.Dimension.WebHome]] to IT and its children.
211 ** Inherits the (% style="color:#e74c3c" %)constraints(%%) from [[Dataflow>>doc:Glossary.Dataflow.WebHome]] CENSUS_CUBE2 for the CAS [[Dimension>>doc:Glossary.Dimension.WebHome]].
212 ** Inherits the [[AGE>>doc:Glossary.Age.WebHome]] (% style="color:#e74c3c" %)constraint(%%) applied at the (% style="color:#e74c3c" %)level(%%) of the [[DSD>>doc:Glossary.Data structure definition.WebHome]].
Helena K. 2.1 213
Artur K. 21.1 214 The (% style="color:#e74c3c" %)Constraints(%%) are defined as follows:
Helena K. 2.1 215
Helena K. 22.2 216 DSD Constraint
Helena K. 2.1 217
Helena K. 14.2 218 [[image:1747386911707-332.png]]
Helena K. 2.1 219
Helena K. 22.2 220 Dataflow Constraints
Helena K. 2.1 221
Helena K. 14.2 222 [[image:1747386933952-158.png]]
Helena K. 2.1 223
Helena K. 14.2 224 [[image:1747386970127-658.png]]
Helena K. 2.1 225
Helena K. 22.2 226 Provision Agreement Constraint
Helena K. 2.1 227
Helena K. 14.2 228 [[image:1747386991329-805.png]]
Helena K. 2.1 229
Helena K. 14.1 230 ==== 10.3.4.2 Combination of Constraints ====
Helena K. 2.1 231
232 The possible combination of constraining terms are explained in this section, following a few examples.
233
Artur K. 22.1 234 Let’s assume a [[DSD>>doc:Glossary.Data structure definition.WebHome]] with the following [[Components>>doc:Glossary.Component.WebHome]]:
Helena K. 2.1 235
Helena K. 14.2 236 [[image:1747387057775-838.png]]
Helena K. 2.1 237
Helena K. 14.2 238 [[image:1747387089210-741.png]]
239
Helena K. 2.1 240 On the above, let’s assume the following use cases with their constraining requirements:
241
Helena K. 14.1 242 ===== 10.3.4.2.1 Use Case 1: A Constraint on allowed values for some Dimensions =====
Helena K. 2.1 243
244 R1: Allow monthly and quarterly data
245 R2: Allow Mexico for vis-à-vis country
246
247 This is expressed with the following CubeRegion:
248
Helena K. 14.2 249 [[image:1747387154981-708.png]]
Helena K. 2.1 250
Helena K. 14.1 251 ===== 10.3.4.2.2 Use Case 2: A Constraint on allowed combinations for some Dimensions =====
Helena K. 2.1 252
253 R1: Allow monthly data for Germany
254 R2: Allow quarterly data for Mexico
255
256 This is expressed with the following DataKeySet:
257
Helena K. 14.2 258 [[image:1747387188821-467.png]]
Helena K. 2.1 259
Helena K. 16.1 260 ===== 10.3.4.2.3 Use Case 3: A Constraint on allowed values for some Dimensions combined with allowed values for some Attributes =====
Helena K. 2.1 261
262 R1: Allow monthly and quarterly data
263 R2: Allow Mexico for vis-à-vis country
264 R3: Allow present for status
265
266 This may be expressed with the following CubeRegion:
267
Helena K. 14.3 268 [[image:1747387231598-634.png]]
Helena K. 14.2 269
Helena K. 14.1 270 ===== 10.3.4.2.4 Use Case 4: A Constraint on allowed combinations for some =====
Helena K. 2.1 271
Artur K. 22.1 272 //**[[Dimensions>>doc:Glossary.Dimension.WebHome]] combined with specific [[Attribute>>doc:Glossary.Attribute.WebHome]] values**//
Helena K. 2.1 273
274 R1: Allow monthly data, for Germany, with unit euro
275 R2: Allow quarterly data, for Mexico, with unit usd
276
277 This is may be expressed with the following DataKeySet:
278
Helena K. 14.3 279 [[image:1747387252077-954.png]]
Helena K. 2.1 280
Helena K. 14.4 281 [[image:1747387281625-859.png]]
282
Helena K. 14.1 283 ===== 10.3.4.2.5 Use Case 5: A Constraint on allowed values for some Dimensions together with some combination of Dimension values =====
Helena K. 2.1 284
285 R1: For annually and quarterly data, for Mexico and Germany, only A status is allowed
286 R2: For monthly data, for Mexico and Germany, only F status is allowed
287
288 Considering the above examples, the following CubeRegions would be created:
289
Helena K. 14.4 290 [[image:1747387330751-405.png]]
Helena K. 2.1 291
Artur K. 22.1 292 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: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).
Helena K. 2.1 293
Artur K. 22.1 294 Nevertheless, there is a much easier approach to that; this is the cascading mechanism of (% style="color:#e74c3c" %)Constraints(%%) (as shown in 10.3.4.1). Hence, these rules would be expressed into two (% style="color:#e74c3c" %)levels(%%) of (% style="color:#e74c3c" %)Constraints(%%), e.g., [[DSD>>doc:Glossary.Data structure definition.WebHome]] and [[Dataflows>>doc:Glossary.Dataflow.WebHome]]:
Helena K. 2.1 295
Artur K. 22.1 296 [[DSD>>doc:Glossary.Data structure definition.WebHome]] CubeRegion:
Helena K. 2.1 297
Helena K. 14.5 298 [[image:1747387369822-932.png]]
299
Helena K. 2.1 300 Dataflow1 CubeRegion:
301
Helena K. 14.5 302 [[image:1747387387944-676.png]]
303
Helena K. 2.1 304 Dataflow2 CubeRegion:
305
Helena K. 14.5 306 [[image:1747387401689-306.png]]
307
Helena K. 14.1 308 ===== 10.3.4.2.6 Use case 6: A Constraint on allowed values for some Dimensions combined with allowed values for Measures =====
Helena K. 2.1 309
Artur K. 22.1 310 R1: Allow monthly data, for Germany, with unit euro, and [[measure>>doc:Glossary.Measure.WebHome]] choice is 'A'
311 R2: Allow quarterly data, for Mexico, with unit usd, and [[measure>>doc:Glossary.Measure.WebHome]] choice is 'B' This is may be expressed with the following DataKeySet:
Helena K. 2.1 312
Helena K. 14.5 313 [[image:1747387437317-733.png]]
314
Helena K. 14.1 315 ===== 10.3.4.2.7 Use Case 7: A Constraint with wildcards for Codes and removePrefix property =====
Helena K. 2.1 316
Artur K. 22.1 317 For this example, we assume that the VIS_CTY [[representation>>doc:Glossary.Representation.WebHome]] has been prefixed with prefix ‘AREA_’. In this (% style="color:#e74c3c" %)Constraint(%%), we need to remove the prefix.
Helena K. 2.1 318
319 R1: Allow monthly and quarterly data
320 R2: Allow vis-à-vis countries that start with M
321 R3: Remove the prefix ‘AREA_’
322
Helena K. 16.1 323 This may be expressed with the following CubeRegion:
324
Helena K. 14.6 325 [[image:1747387461703-763.png]]
Helena K. 14.5 326
Helena K. 16.1 327 10.3.4.2.8 Use Case 8: A Constraint with multilingual support on Attributes
Helena K. 2.1 328
329 R1: Allow monthly and quarterly data
330 R2: Allow Mexico for vis-à-vis country
Artur K. 22.1 331 R3: Allow a [[comment>>doc:Glossary.Comment.WebHome]], in English, which includes the term adjusted for status
Helena K. 2.1 332
333 This may be expressed with the following CubeRegion:
334
Helena K. 14.6 335 [[image:1747387484366-337.png]]
Helena K. 2.1 336
Helena K. 14.1 337 ===== 10.3.4.2.9 Use Case 9: A Constraint on allowed values for Dimensions combined with allowed values for Metadata Attributes =====
Helena K. 2.1 338
339 R1: Allow monthly and quarterly data
340 R2: Allow Mexico for vis-à-vis country
341 R3: Allow John Doe for contact
342
343 This may be expressed with the following CubeRegion:
344
Helena K. 15.1 345 [[image:1747387514061-293.png]]
Helena K. 2.1 346
Helena K. 14.1 347 ==== 10.3.4.3 Other constraining terms ====
Helena K. 2.1 348
349 Beyond the cube regions and keysets, there is one more constraining term, i.e., the ReleaseCalendar.
350
Artur K. 22.1 351 The ReleaseCalendar is the only term that does not apply on [[Components>>doc:Glossary.Component.WebHome]]; it specifies the schedule of publication or reporting of the [[dataset>>doc:Glossary.Data set.WebHome]] or metadataset.
Helena K. 2.1 352
353 For example, the ReleaseCalendar for Provider BIS, is specified in the three following terms:
354
355 * Periodicity: how often data should be reported, e.g., monthly
356 * Offset: the number of days between the 1^^st^^ of January and the first release of data, e.g., 10 days
357 * Tolerance: the maximum allowed of days that data may be considered, without being considered as late, e.g., 5 days
358
359 With the above terms, BIS would need to report data between the 10^^th^^ and 15^^th^^ of every month.
360
Artur K. 22.1 361 NOTE: The [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] 2.1 constraining term ReferencePeriod has been deprecated in [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] 3.0; thus, the TimeDimension and any [[Dimension>>doc:Glossary.Dimension.WebHome]] with a time [[Representation>>doc:Glossary.Representation.WebHome]] can be constrained within a CubeRegion or MetadataTargetRegion, using the TimeRangeValue.
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