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19	19	== 1.2 The XML Design ==
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21		-[[All>>doc:OntologyElements.All.WebHome]] of these document types will share a common "envelope" at the message level ("SDMXMessage.xsd"), as well as a set of common low-level [[components>>doc:IMElements.components.WebHome]] ("SDMXCommon[subset].xsd") so that header information and basic [[structure>>doc:IMElements.structure.WebHome]] of a message will always be the same.
	21	+All of these document types will share a common "envelope" at the message (% style="color:#e74c3c" %)level(%%) ("SDMXMessage.xsd"), as well as a set of common low-(% style="color:#e74c3c" %)level(%%) [[components>>doc:sdmx:Glossary 2\.1.Component.WebHome]] ("SDMXCommon[subset].xsd") so that header information and basic structure of a message will always be the same.
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23		-* Schema and sub-modules for describing all types of [[structural metadata>>doc:sdmx:Glossary 2\.1.Structural metadata.WebHome]] - for [[data sets>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] ([[data structure definitions>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]]), for [[metadata sets>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]] ([[metadata structure definitions>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]]), for related groups of [[metadata>>doc:IMElements.metadata.WebHome]] and data structures, and for all types of structural objects involved in registry-based exchanges ("SDMXStructure[*subset*].xsd")
24		-* [[Structure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.WebHome]] specific data schema for for updates, revisions/[[bilateral exchange>>doc:sdmx:Glossary 2\.1.Bilateral exchange.WebHome]] ("SDMXDataStructureSpecific.xsd")
	23	+* Schema and sub-modules for describing all types of [[structural metadata>>doc:sdmx:Glossary 2\.1.Structural metadata.WebHome]] - for [[data sets>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] ([[data structure definitions>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]]), for [[metadata sets>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]] ([[metadata structure definitions>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]]), for related groups of metadata and data structures, and for all types of structural objects involved in registry-based exchanges ("SDMXStructure[*subset*].xsd")
	24	+* Structure specific data schema for for updates, revisions/[[bilateral exchange>>doc:sdmx:Glossary 2\.1.Bilateral exchange.WebHome]] ("SDMXDataStructureSpecific.xsd")
25	25	* Generic schema and sub-modules for registry interfaces ("SDMXRegistry [*subset*].xsd")
26	26	* Generic schema for [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] sets ("SDMXMetadataGeneric.xsd")
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28	28	== 1.3 Fostering the Use of a Standard SDMX-ML ==
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30		-In addition to these different formats, standard mappings and corresponding transformation tools have been developed for the creation of data [[structure>>doc:IMElements.structure.WebHome]]-specific schemas from [[structure>>doc:IMElements.structure.WebHome]] descriptions, to transform XML data instances from one XML [[data description>>doc:sdmx:Glossary 2\.1.Data presentation - detailed description.WebHome]] format to another, and from these formats into the corresponding [[SDMX-ML>>doc:sdmx:Glossary 2\.1.SDMX-ML.WebHome]] messages. This level of free tools support will foster the early use of [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] and permit the data to be easily used across all processes, which is otherwise a difficult requirement to meet. Ultimately, it is the fact that all formats share a common information model that enables this approach to meet the wide set of [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] requirements.
	30	+In addition to these different formats, standard mappings and corresponding transformation tools have been developed for the creation of data structure-specific schemas from structure descriptions, to transform XML data instances from one XML [[data description>>doc:sdmx:Glossary 2\.1.Data presentation - detailed description.WebHome]] format to another, and from these formats into the corresponding [[SDMX-ML>>doc:sdmx:Glossary 2\.1.SDMX-ML.WebHome]] messages. This (% style="color:#e74c3c" %)level(%%) of free tools support will foster the early use of [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] and permit the data to be easily used across all processes, which is otherwise a difficult requirement to meet. Ultimately, it is the fact that all formats share a common information model that enables this approach to meet the wide set of [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] requirements.
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32	32	= 2 NORMATIVE REFERENCES =
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34		-W3C XML Schema Definition [[Language>>doc:sdmx:Glossary 2\.1.Language.WebHome]], [[version>>doc:IMElements.version.WebHome]] 1.0 (URL: http://www.w3c.org/XML/Schema#dev), World Wide Web Consortium
	34	+W3C XML Schema Definition [[Language>>doc:sdmx:Glossary 2\.1.Language.WebHome]], (% style="color:#e74c3c" %)version(%%) 1.0 (URL: http://www.w3c.org/XML/Schema#dev), World Wide Web Consortium
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36		-W3C Extensible Markup [[Language>>doc:sdmx:Glossary 2\.1.Language.WebHome]], [[version>>doc:IMElements.version.WebHome]] 1.0, Third Edition (URL: http://www.w3c.org/TR/2004/REC-xml-20040204/), World Wide Web Consortium
	36	+W3C Extensible Markup [[Language>>doc:sdmx:Glossary 2\.1.Language.WebHome]], (% style="color:#e74c3c" %)version(%%) 1.0, Third Edition (URL: http://www.w3c.org/TR/2004/REC-xml-20040204/), World Wide Web Consortium
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38	38	= 3 CONFORMANCE =
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