Changes for page Part IV. Data and Reference Metadata Namespaces

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...	...	@@ -897,31 +897,33 @@
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898	898	~1. Without the //updatedAfter//, //includeHistory//, //detail//, //attributes// or //measures// URL parameters:
899	899
900		-The response message should contain the retrieved data in a //Replace// dataset (instead of the previous *information* dataset).
	900	+The response message should contain the retrieved data in a *Replace* dataset (instead of the previous *information* dataset).
901	901
902		-2. Without the //updatedAfter// and //includeHistory//, but with //detail//, //attributes// or //measures// URL parameters:
	902	+2. Without the *updatedAfter* and *includeHistory*, but with *detail*, *attributes* or *measures* URL parameters:
903	903
904		-The response message should contain the retrieved data in a //Merge// dataset (instead of the previous *Information* dataset).
	904	+The response message should contain the retrieved data in a *Merge* dataset (instead of the previous *Information* dataset).
905	905
906		-3. With the //updatedAfter// URL parameter:
	906	+3. With the *updatedAfter* URL parameter:
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908	908	The response must include the information of all previously updated, inserted and deleted data or data-related reference metadata, even if bulk deletions have been used. One of the two approaches are possible:
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910		-* a //Delete// dataset for entirely deleted observations and for entirely deleted sets of (data-related reference metadata) attribute values attached to specific dimension combinations and
911		-a //Replace// dataset for all other changed observations and changed attribute and data-related reference metadata values attached to specific dimension combinations, or
912		-* a //Delete// dataset for entirely deleted observations, for entirely deleted sets of (data-related reference metadata) attribute values attached to specific dimension combinations and for individually deleted mesure, attribute and reference metadata values and
913		-a //Merge// dataset for all other updated or inserted observation, attribute and data-related reference metadata values.
	910	+* a *Delete* dataset for entirely deleted observations and for entirely deleted sets of (data-related reference metadata) attribute values attached to specific dimension combinations and
	911	+ a *Replace* dataset for all other changed observations and changed attribute and data-related reference metadata values attached to specific dimension combinations, or
	912	+* a *Delete* dataset for entirely deleted observations, for entirely deleted sets of (data-related reference metadata) attribute values attached to specific dimension combinations and for individually deleted mesure, attribute and reference metadata values and
	913	+ a *Merge* dataset for all other updated or inserted observation, attribute and data-related reference metadata values.
	914	+
	915	+ The DB synchronization use case requires that the generated response must always allow achieving to replicate the exact same punctual data content as currently stored in the queried data source.
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915		-The DB synchronization use case requires that the generated response must always allow achieving to replicate the exact same punctual data content as currently stored in the queried data source.
	917	+1. With the *includeHistory* URL parameter:
	918	+
	919	+ Using a number of datasets with *Delete*, *Replace* or *Merge* actions and limited in their validity time span that allow achieving to replicate the exact same punctual data contents as previously stored in the queried data source.
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917		-~1. With the *includeHistory* URL parameter:
	921	+1. With the *asOf* URL parameter:
	922	+
	923	+ The recommendations of 1 and 2 apply depending on the other parameters. In addition, the returned dataset should have its validity time span limited to the point in time requested in the *asOf* parameter.
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919		-Using a number of datasets with *Delete*, *Replace* or *Merge* actions and limited in their validity time span that allow achieving to replicate the exact same punctual data contents as previously stored in the queried data source.
	925	+[^2]: So far this is recommended for systems that do not require backward-compatibility. Later, with SDMX 4.0, this may generally be made mandatory.
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921		-2. With the *asOf* URL parameter:
922		-
923		-The recommendations of 1 and 2 apply depending on the other parameters. In addition, the returned dataset should have its validity time span limited to the point in time requested in the *asOf* parameter.
924		-
925	925	== 4.2 Reference Metadata Actions ==
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927	927	Reference metadata defined by a Metadataflow or a MetadataProvisionAgreement are exchanged within reference metadatasets, which are maintainable and thus for actions behave like structural metadata (artefacts): When interacting with SDMX Rest web services, the HTTP action verbs GET, PUT and POST are used to indicate the intended action per web request. Consequently, different actions cannot be bundled and executed with “transactional ACIDity”. Note that metadatasets retrieved using the HTTP header “Accept-Language” may contain only partial languages, and thus should be marked with its *isPartialLanguage* property set to true. Submitting such a partial metadataset to update an SDMX storage system will only add or update the included languages but not change other languages.