Changes for page Part VI. Samples
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... ... @@ -1,1 +1,0 @@ 1 -Age|Attribute|Code|Code list|Component|Concept scheme|Currency|Data set|Data structure definition|Dataflow|Dimension|Measure|Representation|SDMX-ML|Statistical data and metadata exchange|Structural metadata|Title|Validation and transformation language - Content
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... ... @@ -1,210 +1,0 @@ 1 -{{box title="**Contents**"}} 2 -{{toc/}} 3 -{{/box}} 4 - 5 -= 1 Introduction = 6 - 7 -This document provides a brief overview of the [[SDMX-ML>>doc:sdmx:Glossary.SDMX-ML.WebHome]] XML sample files. 8 - 9 -All samples use the xsi:schemaLocation [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] to define the location of the XSD schema files for the relevant namespaces. The samples assume that the schemas are held locally in a directory called 'schemas' and are referenced as a relative file path. For example: 10 - 11 -`xsi:schemaLocation="http:~/~/www.sdmx.org/resources/sdmxml/schemas/v3_1/message ../../schemas/SDMXMessage.xsd"` 12 - 13 -Copies of the [[SDMX-ML>>doc:sdmx:Glossary.SDMX-ML.WebHome]] XSD schemas files will need to be in the appropriate directory in order to validate correctly. 14 - 15 -= 2 Structure Samples = 16 - 17 -The Structure Samples provide examples of [[SDMX-ML>>doc:sdmx:Glossary.SDMX-ML.WebHome]] messages within the *structure* namespace which is used for all [[structural metadata>>doc:sdmx:Glossary.Structural metadata.WebHome]] artefacts. 18 - 19 -== Codelist == 20 - 21 -(% class="wikigeneratedid" id="Hcodelist.xml" %) 22 -**codelist.xml** 23 - 24 -A simple enumerated [[code list>>doc:sdmx:Glossary.Code list.WebHome]] directly equivalent to those in (% style="color:#e74c3c" %)version(%%) 2.1 and earlier. 25 - 26 -This example shows the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]]:CL_AGE '[[Age>>doc:sdmx:Glossary.Age.WebHome]]' cross domain [[code list>>doc:sdmx:Glossary.Code list.WebHome]]. 27 - 28 -(% class="wikigeneratedid" id="Hcodelist-extended.xml" %) 29 -**codelist - extended.xml** 30 - 31 -Extended [[code list>>doc:sdmx:Glossary.Code list.WebHome]]. 32 - 33 -Illustration of the feature introduced in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.0 allowing [[code lists>>doc:sdmx:Glossary.Code list.WebHome]] to be defined as an extension of others. One use case envisaged is adding additional [[codes>>doc:sdmx:Glossary.Code.WebHome]] to standard cross domain [[code lists>>doc:sdmx:Glossary.Code list.WebHome]] without needing to take and maintain an explicit copy. 34 - 35 -The sample message has two [[codelists>>doc:sdmx:Glossary.Code list.WebHome]]: 36 - 37 -* [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]]:CL_AGE, a simple enumerated [[codelist>>doc:sdmx:Glossary.Code list.WebHome]]; and 38 -* EXAMPLE:CL_EXTENDED_AGE, an extension of [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]]:CL_AGE. 39 - 40 -CL_EXTENDED_AGE defines two additional [[codes>>doc:sdmx:Glossary.Code.WebHome]] "I" and "S". 41 - 42 -In addition, the ExclusiveCodeSelection option to exclude the "Y" [[code>>doc:sdmx:Glossary.Code.WebHome]] from the CL_AGE [[code list>>doc:sdmx:Glossary.Code list.WebHome]]. The result is CL_AGE, minus "Y", plus "I" and "S". The InclusiveCodeSelection option could have been used if a specific set of [[codes>>doc:sdmx:Glossary.Code.WebHome]] were needed from CL_AGE. 43 - 44 -(% class="wikigeneratedid" id="Hcodelist-discriminatedunion.xml" %) 45 -**codelist - discriminated union.xml** 46 - 47 -Discriminated union of [[code lists>>doc:sdmx:Glossary.Code list.WebHome]]. 48 - 49 -This sample illustrates the discriminated union of [[code lists>>doc:sdmx:Glossary.Code list.WebHome]] use case where a classification or breakdown has multiple "variants" which are all valid or mutually exclusive. 50 - 51 -Economic activity has been used with ISIC4 and NACE2 examples of two mutually exclusive variants. 52 - 53 -In the sample: 54 - 55 -* [[Code list>>doc:sdmx:Glossary.Code list.WebHome]] extension is used to create a new EXAMPLE:CL_ACTIVITY [[code list>>doc:sdmx:Glossary.Code list.WebHome]] consisting of both the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]]:CL_ACTIVITY_NACE2 and [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]]:CL_ACTIVITY_ISIC4 [[codelists>>doc:sdmx:Glossary.Code list.WebHome]]. 56 -* The [[code list>>doc:sdmx:Glossary.Code list.WebHome]] extension prefix feature has been used to prefix the NACE [[codes>>doc:sdmx:Glossary.Code.WebHome]] with "NACE2_", and similarly the ISIC [[codes>>doc:sdmx:Glossary.Code.WebHome]] with "ISIC4_". This ensures there is no ambiguity where the same [[code>>doc:sdmx:Glossary.Code.WebHome]] appear in both NACE and ISIC [[code lists>>doc:sdmx:Glossary.Code list.WebHome]]. 57 -* A [[data structure definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] has been created with an enumerated ACTIVITY [[dimension>>doc:sdmx:Glossary.Dimension.WebHome]] using the EXAMPLE:CL_ACTIVITY [[code list>>doc:sdmx:Glossary.Code list.WebHome]]. 58 -* Two [[data flows>>doc:sdmx:Glossary.Dataflow.WebHome]] are created referencing the [[data structure definition>>doc:sdmx:Glossary.Data structure definition.WebHome]]. One [[data flow>>doc:sdmx:Glossary.Dataflow.WebHome]] has a data (% style="color:#e74c3c" %)constraint(%%) attached with a CubeRegion for ACTIVITY and Value = "NACE2_%". The other has a similar data (% style="color:#e74c3c" %)constraint(%%) with Value = "ISIC4_%". The "%" is the wildcard character for (% style="color:#e74c3c" %)constraints(%%) introduced in (% style="color:#e74c3c" %)version(%%) 3.0. 59 - 60 -The discriminated unions are achieved by requesting either of the [[data flows>>doc:sdmx:Glossary.Dataflow.WebHome]] with references="all" and detail="referencepartial". The result being CL_ACTIVITY with the extensions resolved and the relevant data (% style="color:#e74c3c" %)constraint(%%) applied. Thus CL_ACTIVITY will only contain [[codes>>doc:sdmx:Glossary.Code.WebHome]] prefixed according to the [[data flow>>doc:sdmx:Glossary.Dataflow.WebHome]]: either beginning "NACE2_" or "ISIC4_" 61 - 62 -(% class="wikigeneratedid" id="Hvaluelist.xml" %) 63 -**valuelist.xml** 64 - 65 -A simple enumerated value list. 66 - 67 -Value lists were introduced in (% style="color:#e74c3c" %)version(%%) 3.0 to allow the definition of enumerations where the [[codes>>doc:sdmx:Glossary.Code.WebHome]] do not need to comply with the strict [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] rules for identifiers. Thus a "value" can be any string of characters. 68 - 69 -In [[SDMX-ML>>doc:sdmx:Glossary.SDMX-ML.WebHome]] valuelists are treated as a class of enumeration so appear in the structure message under [[Codelists>>doc:sdmx:Glossary.Code list.WebHome]] alongside simple and extended [[codelists>>doc:sdmx:Glossary.Code list.WebHome]], and specialised geospatial [[codelist>>doc:sdmx:Glossary.Code list.WebHome]] variants. 70 - 71 -[[Currency>>doc:sdmx:Glossary.Currency.WebHome]] is used as the example with the values being [[currency>>doc:sdmx:Glossary.Currency.WebHome]] symbols including "$", "£", "¥" and "﷼". 72 - 73 -== Concept Scheme == 74 - 75 -(% class="wikigeneratedid" id="Hconceptscheme.xml" %) 76 -**conceptscheme.xml** 77 - 78 -The example illustrates a single [[concept scheme>>doc:sdmx:Glossary.Concept scheme.WebHome]] ECB:ECB_CONCEPTS containing multiple individual (% style="color:#e74c3c" %)concepts(%%). 79 - 80 -== ##Data Structure Definition## == 81 - 82 -**##ECB EXR.xml##** 83 - 84 -The example illustrates a [[data structure definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] ([[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]]) for ECB:EXR exchange rates. The (% style="color:#e74c3c" %)concept(%%) of primary [[measure>>doc:sdmx:Glossary.Measure.WebHome]] has been deprecated in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.0 and the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]]'s MeasureList can contain multiple [[measures>>doc:sdmx:Glossary.Measure.WebHome]]. In this case, a single [[measure>>doc:sdmx:Glossary.Measure.WebHome]] OBS_VALUE is defined. 85 - 86 -== ##Dataflow## == 87 - 88 -##**dataflow.xml**## 89 - 90 -A simple [[data flow>>doc:sdmx:Glossary.Dataflow.WebHome]] for the ECB:EXR [[data set>>doc:sdmx:Glossary.Data set.WebHome]]. 91 - 92 -== ##Geospatial## == 93 - 94 -**##geospatial geocomponents.xml##** 95 - 96 -An example of the use of the "GeospatialInformation" [[representation>>doc:sdmx:Glossary.Representation.WebHome]] type. The GeospatialInformation type can be assigned to a [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]], DataAttribute, MetadataAttribute or a [[Measure>>doc:sdmx:Glossary.Measure.WebHome]] in conjunction with the "GEO" role. Values of are included directly in data messages or metadata reports and must conform to the Geo Feature Set syntax defined in Section 6 of the Technical Specifications. 97 - 98 -In the sample: 99 - 100 -* A simple illustrative [[data structure definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] has been defined with IDENTIFIER and TIME_PERIOD [[dimensions>>doc:sdmx:Glossary.Dimension.WebHome]], plus a series [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] AREA. 101 -* The AREA [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] has the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] (% style="color:#e74c3c" %)Concept(%%) Role "GEO" defined identifying it generally as a geospatial [[component>>doc:sdmx:Glossary.Component.WebHome]] following guidelines. 102 -* The AREA [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] also carries a LocalRepresentation with textType="GeospatialInformation". 103 - 104 -**##geospatial geographiccodelist.xml##** 105 - 106 -An example of the definition of GeographicCodelists, a specialised form of [[code list>>doc:sdmx:Glossary.Code list.WebHome]] introduced in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.0. GeographicCodelists are used in the same was as simple [[code lists>>doc:sdmx:Glossary.Code list.WebHome]] to assign a closed enumerated list of values to a [[component>>doc:sdmx:Glossary.Component.WebHome]]. The difference being that the definition of each GeoFeatureSetCode explicitly specifies the geospatial features to which it relates as a string expression using the Geo Feature Set syntax set out in Section 6 of the Technical Specifications. As with any other coded [[component>>doc:sdmx:Glossary.Component.WebHome]], [[data sets>>doc:sdmx:Glossary.Data set.WebHome]] only contain the [[codes>>doc:sdmx:Glossary.Code.WebHome]] and not the Feature Set information itself. Thus, GeoFeatureSetCodes act as pointers to the Geo Feature Set information held in the GeographicCodelist. 107 - 108 -In the sample: 109 - 110 -* A single illustrative GeographicCodelist has been defined which must be under [[Codelists>>doc:sdmx:Glossary.Code list.WebHome]] in the structure message. 111 -* The GeographicCodelist geoType [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] must be given the value of "GeographicCodelist". 112 -* Three illustrative GeoFeatureSetCodes have been defined with IDs "A1", "A2" and "A3". 113 -* The GeoFeatureSetCode Value [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] specifies the geospatial features to which the [[code>>doc:sdmx:Glossary.Code.WebHome]] relates as a string expression. Note that the values shown are conceptual examples and are not syntactically valid Geo Feature Set expressions. 114 - 115 -**##geospatial geogridcodelist.xml##** 116 - 117 -An example of the definition of GeoGridCodelists, the second specialised form of [[codelist>>doc:sdmx:Glossary.Code list.WebHome]] for modelling gridded geographies. 118 -Like GeographicCodelists, GeoGridCodelists act in the same way as simple [[code lists>>doc:sdmx:Glossary.Code list.WebHome]] to assign a closed enumerated list of values to a [[component>>doc:sdmx:Glossary.Component.WebHome]]. 119 -GeoGridCodelists define a geographical grid by setting the X and Y coordinates of a reference point, and the [[dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] of each cell. In addition, each GeoGridCode specifies to which cell in the grid it relates using row and column numbers. 120 - 121 -In the sample: 122 - 123 -* A single illustrative GeoGridCodelist has been defined which must be under [[Codelists>>doc:sdmx:Glossary.Code list.WebHome]] in the structure message. 124 -* The GridDefinition element defines the grid for the [[code list>>doc:sdmx:Glossary.Code list.WebHome]] using a string expression conforming to the Geo Grid syntax set out in Section 6 of the Technical Specifications. 125 -* Each GeoGridCode has an ID and a Name in common with the [[codes>>doc:sdmx:Glossary.Code.WebHome]] of simple [[code lists>>doc:sdmx:Glossary.Code list.WebHome]], but also has a GeoCell element containing the row and column of the grid cell as a string expression using the Grid Cell syntax set out in Section 6 of the Technical Specifications. 126 - 127 -== ##VTL Transformations## == 128 - 129 -##**VTL Sample 1.xml**## 130 - 131 -Illustrates the use of [[VTL>>doc:sdmx:Glossary.Validation and transformation language.WebHome]] Rulesets to validate an [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] [[dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]. The validation process adds additional identifiers and [[measures>>doc:sdmx:Glossary.Measure.WebHome]] to the resulting [[VTL>>doc:sdmx:Glossary.Validation and transformation language.WebHome]] [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] indicating, on a row by row basis the validation rule applied and the outcome in terms of a valid / invalid. If invalid, details of the error found and its severity are added. 132 - 133 -A second transformation takes the resulting [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] filtering out high-severity validation errors and persists the result back to a [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] [[dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] using [[VTL>>doc:sdmx:Glossary.Validation and transformation language.WebHome]] mappings. 134 - 135 -##**VTL Sample 2.xml**## 136 - 137 -Illustrates aggregation of an [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] [[dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] using [[VTL>>doc:sdmx:Glossary.Validation and transformation language.WebHome]] hierarchical rulesets, filtering and user defined operators. 138 - 139 -After the initial aggregation, unaggregated observations removed are removed from the result [[dataset>>doc:sdmx:Glossary.Data set.WebHome]]. A user defined operator is subsequently applied to calculate a percentage [[measure>>doc:sdmx:Glossary.Measure.WebHome]] with the final persistent result (% style="color:#e74c3c" %)mapped(%%) from [[VTL>>doc:sdmx:Glossary.Validation and transformation language.WebHome]] to a [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] [[dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]. 140 - 141 -##**VTL Sample 3.xml**## 142 - 143 -Illustrates the calculation of a GDP per capita [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] from an input (% style="color:#e74c3c" %)mapped(%%) [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] [[dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] containing GDP and population indicators on a country by country basis. 144 - 145 -= 3 Data Samples = 146 - 147 -[[SDMX-ML>>doc:sdmx:Glossary.SDMX-ML.WebHome]] 3.0 has a single format for data transmission - the Structure Specific Data message. Alternative formats from (% style="color:#e74c3c" %)version(%%) 2.1 and earlier such as Generic, Utility and Cross Sectional are deprecated. 148 - 149 -The Structure Specific Data message is characterised by the XML elements and [[attributes>>doc:sdmx:Glossary.Attribute.WebHome]] being derived from the [[data structure definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] of the [[data set>>doc:sdmx:Glossary.Data set.WebHome]]. This provides two main benefits: 150 - 151 -1. The message content is relatively compact. 152 -1. It is possible to use an XML schema to validate that the [[data set>>doc:sdmx:Glossary.Data set.WebHome]] contains the correct values as defined by the [[data structure definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] and any (% style="color:#e74c3c" %)constraints(%%) attached to the [[dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]], [[data structure definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] or data provision agreement. 153 - 154 -The samples therefore include both the Structure Specific Data XML, and a corresponding example validation schema XSD. Successful schema validation confirms that the XML is both a valid Structure Specific Data message, and the content is valid according to the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] [[structural metadata>>doc:sdmx:Glossary.Structural metadata.WebHome]]. 155 - 156 -== Aggregated Time Series with Simple Data Attributes == 157 - 158 -##**ECB EXR.xml**## 159 - 160 -Structure specific data message. 161 - 162 -Excerpt from the ECB's Exchange Rates [[dataset>>doc:sdmx:Glossary.Data set.WebHome]]. 163 - 164 -In this example which is representative of aggregated time-series [[datasets>>doc:sdmx:Glossary.Data set.WebHome]] with a single [[measure>>doc:sdmx:Glossary.Measure.WebHome]], observations are grouped together under series, which in turn are grouped under the [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] element. 165 - 166 -The [[dimension>>doc:sdmx:Glossary.Dimension.WebHome]] values and those of series-(% style="color:#e74c3c" %)level(%%) [[attributes>>doc:sdmx:Glossary.Attribute.WebHome]] are expressed as XML [[attributes>>doc:sdmx:Glossary.Attribute.WebHome]] on each series element. Similarly, the TIME_PERIOD, OBS_VALUE and any observation-(% style="color:#e74c3c" %)level(%%) [[attributes>>doc:sdmx:Glossary.Attribute.WebHome]] are expressed as XML [[attributes>>doc:sdmx:Glossary.Attribute.WebHome]] on each obs element. 167 - 168 -Note that a structure specific namespace ns1 is defined using xsi:schemalocation to reference the validation schema location, in this case ECB_EXR_Dataflow.xsd. 169 - 170 -**##ECB EXR [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]].xsd##** 171 - 172 -Structure-specific schema for validating the [[dataset>>doc:sdmx:Glossary.Data set.WebHome]]. 173 - 174 -The schema defines a complex type called DataSetType derived from the [[data set>>doc:sdmx:Glossary.Data set.WebHome]]'s [[data structure definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] and (% style="color:#e74c3c" %)constraints(%%), in this case those attached to the [[dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]. 175 - 176 -== ##Aggregated Time Series with Complex Data Attributes## == 177 - 178 -Complex [[attributes>>doc:sdmx:Glossary.Attribute.WebHome]] include those with multilingual text and arrays of values. 179 - 180 -**##EXB EXR CA.xml##** 181 - 182 -Structure specific data message. 183 - 184 -A modification of the ECB's Exchange Rates [[dataset>>doc:sdmx:Glossary.Data set.WebHome]] illustrating the following complex [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] use cases: 185 - 186 -[[TITLE>>doc:sdmx:Glossary.Title.WebHome]] - multi-lingual series-(% style="color:#e74c3c" %)level(%%) array [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] 187 - 188 -SOURCE_AGENCY - coded series-(% style="color:#e74c3c" %)level(%%) array [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] specifying a minimum of three values 189 - 190 -SOURCE_PUB - uncoded string series-(% style="color:#e74c3c" %)level(%%) array [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] with maximum length of 350 characters 191 - 192 -OBS_STATUS - coded observation-(% style="color:#e74c3c" %)level(%%) array [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] 193 - 194 -Note that a structure specific namespace ns1 is defined using xsi:schemalocation to reference the validation schema location, in this case ECB_EXR_Dataflow.xsd. 195 - 196 -##**ECB EXR CA Dataflow.xsd**## 197 - 198 -Structure specific schema for validating the [[dataset>>doc:sdmx:Glossary.Data set.WebHome]]. 199 - 200 -The schema defines a complex type called DataSetType derived from the [[data set>>doc:sdmx:Glossary.Data set.WebHome]]'s [[data structure definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] and (% style="color:#e74c3c" %)constraints(%%), in this case those attached to the [[dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]]. 201 - 202 -Complex types based on the abstract [[dsd>>doc:sdmx:Glossary.Data structure definition.WebHome]]:CompType are defined for each complex [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]]. 203 - 204 -##**ECB EXR CA DSD.xml**## 205 - 206 -Structure message describing the [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] for the above [[dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] illustrating, in particular, the definition of complex [[attributes>>doc:sdmx:Glossary.Attribute.WebHome]]: 207 - 208 -The XML attribute isMultiLingual="true" on the \<str:TextFormat…\> element specifies a multi-lingual string representation. 209 - 210 -Setting the maxOccurs XML [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]] to a number greater than 1 (or unbounded) on the \<str:LocalRepresentation…\> element specifies an array.