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Helena 14.1 1 {{box title="**Contents**"}}
2 {{toc/}}
3 {{/box}}
Helena 2.1 4
5 == 10.1 Introduction ==
6
Elena 25.3 7 A [[Constraint>>doc:Glossary.Constraint.WebHome]] is a [[Maintainable Artefact>>doc:Glossary.Maintainable artefact.WebHome]] that can be associated to one or more of:
Helena 2.1 8
9 * Data Structure Definition
10 * Metadata Structure Definition
Artur 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]]
Elena 25.3 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]] [[Constraint>>doc:Glossary.Constraint.WebHome]])
Helena 2.1 16 * Simple or Queryable Data Sources
Elena 25.3 17 * [[Dataset>>doc:Glossary.Data set.WebHome]]
Helena 2.1 18 * Metadataset
19
Elena 25.3 20 Note that regardless of the [[Artefact>>doc:Glossary.Artefact.WebHome]] to which the [[Constraint>>doc:Glossary.Constraint.WebHome]] 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 [[Constraint>>doc:Glossary.Constraint.WebHome]] that can be attached to a Metadata/[[Data Provider>>doc:Glossary.Data provider.WebHome]].
Helena 2.1 21
22 == 10.2 Types of Constraint ==
23
Elena 25.3 24 The [[Constraint>>doc:Glossary.Constraint.WebHome]] can be of one of two types:
Helena 2.1 25
Elena 25.3 26 * Data [[constraint>>doc:Glossary.Constraint.WebHome]]
27 * Metadata [[constraint>>doc:Glossary.Constraint.WebHome]]
Helena 2.1 28
Elena 25.3 29 The Data [[Constraint>>doc:Glossary.Constraint.WebHome]] may serve two different perspectives, depending on the way the latter is retrieved. These are:
Helena 2.1 30
Elena 25.3 31 * Allowed [[constraint>>doc:Glossary.Constraint.WebHome]]
32 * Actual [[constraint>>doc:Glossary.Constraint.WebHome]]
Helena 2.1 33
Elena 25.3 34 The former (allowed – also valid for Metadata [[Constraint>>doc:Glossary.Constraint.WebHome]]) 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 [[Constraint>>doc:Glossary.Constraint.WebHome]] in response to an availability request (only possible for data).
Helena 2.1 35
Elena 25.3 36 For Actual Data [[Constraint>>doc:Glossary.Constraint.WebHome]], there a few characteristics that are worth noting:
Helena 2.1 37
38 * They can only be retrieved by the availability requests (as specified in the REST API).
Artur 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 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
Elena 25.3 47 A [[Constraint>>doc:Glossary.Constraint.WebHome]] 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 2.1 48
Artur 22.1 49 In terms of data the [[components>>doc:Glossary.Component.WebHome]] are:
Helena 2.1 50
Artur 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 2.1 57
Artur 22.1 58 In terms of [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] the [[components>>doc:Glossary.Component.WebHome]] are:
Helena 2.1 59
Artur 22.1 60 * Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]]
Helena 2.1 61
Elena 25.3 62 For a [[Constraint>>doc:Glossary.Constraint.WebHome]] based on a [[DSD>>doc:Glossary.Data structure definition.WebHome]] the [[Constraint>>doc:Glossary.Constraint.WebHome]] can reference one or more of:
Helena 2.1 63
Elena 25.3 64 * [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]]
Artur 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 2.1 68
Elena 25.3 69 For a [[Constraint>>doc:Glossary.Constraint.WebHome]] based on an [[MSD>>doc:Glossary.Metadata structure definition.WebHome]] the [[Constraint>>doc:Glossary.Constraint.WebHome]] can reference one or more of:
Helena 2.1 70
71 * Metadata Structure Definition
Artur 22.1 72 * [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]]
73 * Metadata [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]]
Helena 2.1 74 * Metadata Provider
75 * Metadata Set
76
Elena 25.3 77 Furthermore, there can be more than one [[Constraint>>doc:Glossary.Constraint.WebHome]] specified for a specific object e.g., more than one [[Constraint>>doc:Glossary.Constraint.WebHome]] for a specific [[DSD>>doc:Glossary.Data structure definition.WebHome]].
Helena 2.1 78
Elena 25.3 79 In view of the flexibility of [[constraints>>doc:Glossary.Constraint.WebHome]] attachment, clear rules on their usage are required. These are elaborated below.
Helena 2.1 80
81 === 10.3.2 Multiple Constraints ===
82
Elena 25.3 83 There can be many [[Constraint>>doc:Glossary.Constraint.WebHome]] for any Constrainable [[Artefact>>doc:Glossary.Artefact.WebHome]] (e.g., [[DSD>>doc:Glossary.Data structure definition.WebHome]]), subject to the following restrictions:
Helena 2.1 84
Helena 14.1 85 ==== 10.3.2.1 Cube Region ====
Helena 2.1 86
Elena 25.3 87 A [[Constraint>>doc:Glossary.Constraint.WebHome]] can contain multiple [[Member Selections>>doc:Glossary.Member selection.WebHome]] (e.g., [[Dimensions>>doc:Glossary.Dimension.WebHome]]).
Helena 2.1 88
Artur 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.
Elena 25.3 91 * For partial reference resolution purposes (as per the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] REST API), the latest non-draft [[Constraint>>doc:Glossary.Constraint.WebHome]] must be considered.
Artur 22.1 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 2.1 94
Helena 14.1 95 ==== 10.3.2.2 Key Set ====
Helena 2.1 96
Elena 25.3 97 Key Sets will be processed in the order they appear in the [[Constraint>>doc:Glossary.Constraint.WebHome]] and wildcards can be used (e.g., any key position not reference explicitly is deemed to be "all values").
Helena 2.1 98
Artur 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 2.1 100
Elena 25.3 101 In addition, [[Attribute>>doc:Glossary.Attribute.WebHome]], [[Measure>>doc:Glossary.Measure.WebHome]] and Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]] [[constraints>>doc:Glossary.Constraint.WebHome]] 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 2.1 102
103 Finally, a validity period may be specified per Key.
104
105 === 10.3.3 Inheritance of a Constraint ===
106
Helena 14.1 107 ==== 10.3.3.1 Attachment levels of a Constraint ====
Helena 2.1 108
Elena 25.3 109 There are three levels of [[Constraint>>doc:Glossary.Constraint.WebHome]] attachment for which these inheritance rules apply:
Helena 2.1 110
Elena 25.3 111 • [[DSD>>doc:Glossary.Data structure definition.WebHome]]/[[MSD>>doc:Glossary.Metadata structure definition.WebHome]] – top level o [[Dataflow>>doc:Glossary.Dataflow.WebHome]]/[[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] – second level
Helena 2.1 112
Elena 25.3 113 ▪ [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]] – third level
Helena 2.1 114
Elena 25.3 115 Note that these rules do not apply to the Simple Datasource or Queryable Datasource; the [[Constraint>>doc:Glossary.Constraint.WebHome]](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 [[Constraints>>doc:Glossary.Constraint.WebHome]] 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 2.1 116
Elena 25.3 117 It is not necessary for a [[Constraint>>doc:Glossary.Constraint.WebHome]] to be attached to a higher level [[artefact>>doc:Glossary.Artefact.WebHome]]. e.g., it is valid to have a [[Constraint>>doc:Glossary.Constraint.WebHome]] for a [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]] where there are no [[constraints>>doc:Glossary.Constraint.WebHome]] attached the relevant [[dataflow>>doc:Glossary.Dataflow.WebHome]] or [[DSD>>doc:Glossary.Data structure definition.WebHome]].
Helena 2.1 118
Helena 14.1 119 ==== 10.3.3.2 Cascade rules for processing Constraints ====
Helena 2.1 120
Elena 25.3 121 The processing of the [[constraint>>doc:Glossary.Constraint.WebHome]] 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 [[constraints>>doc:Glossary.Constraint.WebHome]] declared at higher levels. The rules for the lower-level [[constraints>>doc:Glossary.Constraint.WebHome]] (attached to [[Dataflow>>doc:Glossary.Dataflow.WebHome]]/ [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] and [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]]) are detailed below.
Helena 2.1 122
Elena 25.3 123 Note that there can be a situation where a [[constraint>>doc:Glossary.Constraint.WebHome]] is specified at a lower level before a [[constraint>>doc:Glossary.Constraint.WebHome]] is specified at a higher level. Therefore, it is possible that a higher-level [[constraint>>doc:Glossary.Constraint.WebHome]] makes a lower-level 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 [[constraint>>doc:Glossary.Constraint.WebHome]] for attachment. However, the cascade rules on evaluating [[constraints>>doc:Glossary.Constraint.WebHome]] for usage are clear – the higher-level [[constraint>>doc:Glossary.Constraint.WebHome]] takes precedence in any conflicts that result in a less restrictive specification at the lower level.
Helena 2.1 124
Helena 14.1 125 ==== 10.3.3.3 Cube Region ====
Helena 2.1 126
Elena 25.3 127 It is not necessary to have a [[Constraint>>doc:Glossary.Constraint.WebHome]] on the higher-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 [[Constraint>>doc:Glossary.Constraint.WebHome]] at the higher level(s) then:
Helena 2.1 128
Elena 25.3 129 * The lower-level [[Constraint>>doc:Glossary.Constraint.WebHome]] cannot be less restrictive than the [[Constraint>>doc:Glossary.Constraint.WebHome]] specified for the same [[Member Selection>>doc:Glossary.Member selection.WebHome]] (e.g. [[Dimension>>doc:Glossary.Dimension.WebHome]]) at the next higher 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 [[Constraint>>doc:Glossary.Constraint.WebHome]] 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 [[Constraint>>doc:Glossary.Constraint.WebHome]] at the lower 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 level(s).
131 * Any [[Member Selection>>doc:Glossary.Member selection.WebHome]], which is not referenced in a [[Constraint>>doc:Glossary.Constraint.WebHome]], is deemed to be constrained according to the [[Constraint>>doc:Glossary.Constraint.WebHome]] specified at the next higher level which [[constraints>>doc:Glossary.Constraint.WebHome]] that [[Member Selection>>doc:Glossary.Member selection.WebHome]].
132 * If there is a conflict when resolving the [[Constraint>>doc:Glossary.Constraint.WebHome]] in terms of a lower-level [[Constraint>>doc:Glossary.Constraint.WebHome]] being less restrictive than a higher-level [[Constraint>>doc:Glossary.Constraint.WebHome]], then the [[Constraint>>doc:Glossary.Constraint.WebHome]] at the higher-level is used.
Helena 2.1 133
Elena 25.3 134 Note that it is possible for a [[Constraint>>doc:Glossary.Constraint.WebHome]] at a higher level to constrain, say, four [[Dimensions>>doc:Glossary.Dimension.WebHome]] in a single [[Constraint>>doc:Glossary.Constraint.WebHome]], and a [[Constraint>>doc:Glossary.Constraint.WebHome]] at a lower level to constrain the same four in two, three, or four [[Constraint>>doc:Glossary.Constraint.WebHome]].
Helena 2.1 135
Helena 14.1 136 ==== 10.3.3.4 Key Set ====
Helena 2.1 137
Elena 25.3 138 It is not necessary to have a [[Constraint>>doc:Glossary.Constraint.WebHome]] on the higher-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 [[Constraint>>doc:Glossary.Constraint.WebHome]] at the higher level(s) then:
Helena 2.1 139
Elena 25.3 140 * The lower-level [[Constraint>>doc:Glossary.Constraint.WebHome]] cannot be less restrictive than the [[Constraint>>doc:Glossary.Constraint.WebHome]] specified at the higher level.
141 * The [[Constraint>>doc:Glossary.Constraint.WebHome]] at the lower level for any one [[Member Selection>>doc:Glossary.Member selection.WebHome]] further constrains the keys specified at the higher level(s).
142 * Any [[Member Selection>>doc:Glossary.Member selection.WebHome]], which is not referenced in a [[Constraint>>doc:Glossary.Constraint.WebHome]], is deemed to be constrained according to the [[Constraint>>doc:Glossary.Constraint.WebHome]] specified at the next higher level which [[constraints>>doc:Glossary.Constraint.WebHome]] that [[Member Selection>>doc:Glossary.Member selection.WebHome]].
143 * If there is a conflict when resolving the keys in the [[Constraint>>doc:Glossary.Constraint.WebHome]] at two levels, in terms of a lower-level [[constraints>>doc:Glossary.Constraint.WebHome]] being less restrictive than a higher-level [[Constraint>>doc:Glossary.Constraint.WebHome]], then the offending keys specified at the lower level are not deemed part of the [[Constraint>>doc:Glossary.Constraint.WebHome]].
Helena 2.1 144
Elena 25.3 145 Note that a Key in a Key Set can have wildcarded [[Components>>doc:Glossary.Component.WebHome]]. For instance, the [[Constraint>>doc:Glossary.Constraint.WebHome]] may simply constrain the [[Dimension>>doc:Glossary.Dimension.WebHome]] FREQ to "A", and all keys where the FREQ="A" are therefore valid.
Helena 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
Elena 25.3 149 *
150 *1. Determine all possible keys that are valid at the higher level.
151 *1. These keys are deemed to be inherited by the lower-level constrained object, subject to the [[Constraint>>doc:Glossary.Constraint.WebHome]] specified at the lower level.
152 *1. Determine all possible keys that are possible using the [[Constraint>>doc:Glossary.Constraint.WebHome]] specified at the lower level.
153 *1. At the lower level inherit all keys that match with the higher-level [[Constraint>>doc:Glossary.Constraint.WebHome]].
154 *1. If there are keys in the lower-level [[Constraint>>doc:Glossary.Constraint.WebHome]] that are not inherited then the key is invalid (i.e., it is less restrictive).
Helena 2.1 155
156 === 10.3.4 Constraints Examples ===
157
Helena 14.2 158 ==== 10.3.4.1 Data Constraint and Cascading ====
Helena 2.1 159
Helena 14.1 160 The following scenario is used.
161
Artur 22.1 162 A [[DSD>>doc:Glossary.Data structure definition.WebHome]] contains the following [[Dimensions>>doc:Glossary.Dimension.WebHome]]:
Helena 2.1 163
164 * GEO – Geography
165 * SEX – Sex
166 * AGE – Age
167 * CAS – Current Activity Status
168
Elena 25.3 169 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 levels to specify the actual [[code>>doc:Glossary.Code.WebHome]] that are valid for the object to which the [[Constraint>>doc:Glossary.Constraint.WebHome]] is attached.
Helena 2.1 170
171 [[image:SDMX 3-0-0 SECTION 6 FINAL-1.0_en_77bea5e.png||height="344" width="554"]]
172
Helena 14.1 173 **Figure 20: Example Scenario for Constraints **
Helena 2.1 174
Helena 14.1 175 Constraints are declared as follows:
176
Helena 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 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 2.1 184
Elena 25.3 185 * The same [[Constraint>>doc:Glossary.Constraint.WebHome]] applies to both Provision Agreements.
Helena 2.1 186
187 The cascade rules elaborated above result as follows:
188
Artur 22.1 189 [[DSD>>doc:Glossary.Data structure definition.WebHome]]
Helena 2.1 190
Artur 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 2.1 192
Artur 22.1 193 [[Dataflow>>doc:Glossary.Dataflow.WebHome]] CENSUS_CUBE1
Helena 2.1 194
Elena 25.3 195 * 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 [[constraint>>doc:Glossary.Constraint.WebHome]] 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).
Artur 22.1 196 ** Restricts the CAS [[codes>>doc:Glossary.Code.WebHome]] to 003 and 004.
Helena 2.1 197
Artur 22.1 198 [[Dataflow>>doc:Glossary.Dataflow.WebHome]] CENSUS_CUBE2
Helena 2.1 199
Artur 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.
Elena 25.3 201 ** Inherits the [[AGE>>doc:Glossary.Age.WebHome]] [[constraints>>doc:Glossary.Constraint.WebHome]] applied at the level of the [[DSD>>doc:Glossary.Data structure definition.WebHome]].
Helena 2.1 202
203 Provision Agreement CENSUS_CUBE1_IT
204
Artur 22.1 205 * Restricts the [[codes>>doc:Glossary.Code.WebHome]] for the GEO [[Dimension>>doc:Glossary.Dimension.WebHome]] to IT and its children.
Elena 25.3 206 ** Inherits the [[constraints>>doc:Glossary.Constraint.WebHome]] from [[Dataflow>>doc:Glossary.Dataflow.WebHome]] CENSUS_CUBE1 for the [[AGE>>doc:Glossary.Age.WebHome]] and CAS Dimensions.
Helena 2.1 207
208 Provision Agreement CENSUS_CUBE2_IT
209
Artur 22.1 210 * Restricts the [[codes>>doc:Glossary.Code.WebHome]] for the GEO [[Dimension>>doc:Glossary.Dimension.WebHome]] to IT and its children.
Elena 25.3 211 ** Inherits the [[constraints>>doc:Glossary.Constraint.WebHome]] from [[Dataflow>>doc:Glossary.Dataflow.WebHome]] CENSUS_CUBE2 for the CAS [[Dimension>>doc:Glossary.Dimension.WebHome]].
212 ** Inherits the [[AGE>>doc:Glossary.Age.WebHome]] [[constraint>>doc:Glossary.Constraint.WebHome]] applied at the level of the [[DSD>>doc:Glossary.Data structure definition.WebHome]].
Helena 2.1 213
Elena 25.3 214 The [[Constraint>>doc:Glossary.Constraint.WebHome]] are defined as follows:
Helena 2.1 215
Helena 22.2 216 DSD Constraint
Helena 2.1 217
Helena 14.2 218 [[image:1747386911707-332.png]]
Helena 2.1 219
Elena 25.3 220 Dataflow [[Constraints>>doc:Glossary.Constraint.WebHome]]
Helena 2.1 221
Helena 14.2 222 [[image:1747386933952-158.png]]
Helena 2.1 223
Helena 14.2 224 [[image:1747386970127-658.png]]
Helena 2.1 225
Elena 25.3 226 Provision Agreement [[Constraints>>doc:Glossary.Constraint.WebHome]]
Helena 2.1 227
Helena 14.2 228 [[image:1747386991329-805.png]]
Helena 2.1 229
Helena 14.1 230 ==== 10.3.4.2 Combination of Constraints ====
Helena 2.1 231
232 The possible combination of constraining terms are explained in this section, following a few examples.
233
Artur 22.1 234 Let’s assume a [[DSD>>doc:Glossary.Data structure definition.WebHome]] with the following [[Components>>doc:Glossary.Component.WebHome]]:
Helena 2.1 235
Helena 14.2 236 [[image:1747387057775-838.png]]
Helena 2.1 237
Helena 14.2 238 [[image:1747387089210-741.png]]
239
Helena 2.1 240 On the above, let’s assume the following use cases with their constraining requirements:
241
Helena 14.1 242 ===== 10.3.4.2.1 Use Case 1: A Constraint on allowed values for some Dimensions =====
Helena 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 14.2 249 [[image:1747387154981-708.png]]
Helena 2.1 250
Helena 14.1 251 ===== 10.3.4.2.2 Use Case 2: A Constraint on allowed combinations for some Dimensions =====
Helena 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 14.2 258 [[image:1747387188821-467.png]]
Helena 2.1 259
Helena 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 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 14.3 268 [[image:1747387231598-634.png]]
Helena 14.2 269
Helena 14.1 270 ===== 10.3.4.2.4 Use Case 4: A Constraint on allowed combinations for some =====
Helena 2.1 271
Artur 22.1 272 //**[[Dimensions>>doc:Glossary.Dimension.WebHome]] combined with specific [[Attribute>>doc:Glossary.Attribute.WebHome]] values**//
Helena 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 14.3 279 [[image:1747387252077-954.png]]
Helena 2.1 280
Helena 14.4 281 [[image:1747387281625-859.png]]
282
Helena 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 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 14.4 290 [[image:1747387330751-405.png]]
Helena 2.1 291
Elena 25.3 292 The problem with this approach is that according to the business rule for [[Constraint>>doc:Glossary.Constraint.WebHome]], 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 2.1 293
Elena 25.3 294 Nevertheless, there is a much easier approach to that; this is the cascading mechanism of [[Constraint>>doc:Glossary.Constraint.WebHome]] (as shown in 10.3.4.1). Hence, these rules would be expressed into two (% style="color:#e74c3c" %)levels(%%) of [[Constraint>>doc:Glossary.Constraint.WebHome]], e.g., [[DSD>>doc:Glossary.Data structure definition.WebHome]] and [[Dataflows>>doc:Glossary.Dataflow.WebHome]]:
Helena 2.1 295
Artur 22.1 296 [[DSD>>doc:Glossary.Data structure definition.WebHome]] CubeRegion:
Helena 2.1 297
Helena 14.5 298 [[image:1747387369822-932.png]]
299
Helena 2.1 300 Dataflow1 CubeRegion:
301
Helena 14.5 302 [[image:1747387387944-676.png]]
303
Helena 2.1 304 Dataflow2 CubeRegion:
305
Helena 14.5 306 [[image:1747387401689-306.png]]
307
Elena 25.3 308 ===== 10.3.4.2.6 Use case 6: A Constraint on allowed values for some [[Dimensions>>doc:Glossary.Dimension.WebHome]] combined with allowed values for Measures =====
Helena 2.1 309
Artur 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 2.1 312
Helena 14.5 313 [[image:1747387437317-733.png]]
314
Helena 14.1 315 ===== 10.3.4.2.7 Use Case 7: A Constraint with wildcards for Codes and removePrefix property =====
Helena 2.1 316
Elena 25.3 317 For this example, we assume that the VIS_CTY [[representation>>doc:Glossary.Representation.WebHome]] has been prefixed with prefix ‘AREA_’. In this [[Constraint>>doc:Glossary.Constraint.WebHome]], we need to remove the prefix.
Helena 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 16.1 323 This may be expressed with the following CubeRegion:
324
Helena 14.6 325 [[image:1747387461703-763.png]]
Helena 14.5 326
Helena 16.1 327 10.3.4.2.8 Use Case 8: A Constraint with multilingual support on Attributes
Helena 2.1 328
329 R1: Allow monthly and quarterly data
330 R2: Allow Mexico for vis-à-vis country
Artur 22.1 331 R3: Allow a [[comment>>doc:Glossary.Comment.WebHome]], in English, which includes the term adjusted for status
Helena 2.1 332
333 This may be expressed with the following CubeRegion:
334
Helena 14.6 335 [[image:1747387484366-337.png]]
Helena 2.1 336
Helena 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 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 15.1 345 [[image:1747387514061-293.png]]
Helena 2.1 346
Helena 14.1 347 ==== 10.3.4.3 Other constraining terms ====
Helena 2.1 348
349 Beyond the cube regions and keysets, there is one more constraining term, i.e., the ReleaseCalendar.
350
Artur 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 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 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.