Changes for page Part IV. Data and Reference Metadata Namespaces

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844	844	=== 4.1.2 Replace Action ===
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846		-Data or data-related reference metadata is to be replaced, through either update, insert or delete depending on already existing information. A full replacement is hereby assumed to take place at specific “//replacement levels//”: for entire observations and for any specific dimension combination for data-related reference metadata attributes. Within these “replacement levels” the provided values are inserted or updated, and omitted values are deleted. Values provided for the other attributes (those above the observation level) are merged (see //Merge// action).
	846	+Data or data-related reference metadata is to be replaced, through either update, insert or delete depending on already existing information. A full replacement is hereby assumed to take place at specific “replacement levels”: for entire observations and for any specific dimension combination for data-related reference metadata attributes. Within these “replacement levels” the provided values are inserted or updated, and omitted values are deleted. Values provided for the other attributes (those above the observation level) are merged (see *Merge* action).
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848	848	Only non-dimensional components (measure, attribute or reference metadata values) can be **omitted** (null or absent). Bulk replacing is thus not supported.
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854	854	All observations as well as the sets of data-related reference metadata attributes at specific dimension combinations impacted by the //Replace// action change their time stamp when used to update an SDMX storage system.
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856		-Because the //replace// action always takes place at specific levels, it cannot be used to replace a whole dataset or a whole series. However, a //“replace all”// effect can be achieved by combining a //Delete// dataset containing a completely wildcarded key (where all dimension values are omitted) with a //Merge// or //Replace// dataset within the same data message. Similarly, to replace a whole series, a message can combine a //delete// dataset containing only the partial key of the series (where the not used dimension values are omitted) with a //Merge// or //Replace// dataset for that series.
	856	+Because the //replace// action always takes place at specific levels, it cannot be used to replace a whole dataset or a whole series. However, a //“replace all”// effect can be achieved by combining a //Delete// dataset containing a completely wildcarded key (where all dimension values are omitted) with a //Merge// or //Replace// dataset within the same data message. Similarly, to replace a whole series, a message can combine a *delete* dataset containing only the partial key of the series (where the not used dimension values are omitted) with a //Merge// or //Replace// dataset for that series.
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858	858	=== 4.1.3 Delete Action ===
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874	874	The following convention is used to indicate the state of components in data messages:
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876		-(% style="width:1591.29px" %)
877		-| | |**Dimension value is**|(% style="width:384px" %) |(% style="width:598px" %)**Measure, attribute or reference metadata value is**|(% style="width:201px" %)
878		-| | |**Omitted**|(% style="width:384px" %)**switched off**|(% style="width:598px" %)**Omitted**|(% style="width:201px" %)**Present**
879		-|Action|Delete|bulk deletion: dimension value doesn't matter|(% style="width:384px" %)only for irrelevant dimensions:1) higher-level (reference metadata) attributes not attached to this dimension(incl. TIME\_PERIOD)2) measures and attributes not attached to this dimension if the DSD allows for an ‘evolving structure’ (excl. TIME\_PERIOD)|(% style="width:598px" %)to be deleted only if **all** non-dimension components are omitted|(% style="width:201px" %)to be deleted
880		-| |Merge|//bulk merge is not permitted//|(% style="width:384px" %)(see above)|(% style="width:598px" %)not to be changed|(% style="width:201px" %)to be updated/inserted
881		-| |Replace|//bulk replace is not permitted//|(% style="width:384px" %)(see above)|(% style="width:598px" %)at permitted replacement levels: to be deleted, otherwise not to be changed|(% style="width:201px" %)to be updated/inserted
882		-|Format|XML|xml element/attribute is absent|(% style="width:384px" %)~|xml element/attribute is absent|(% style="width:598px" %)any valid or intentionally missing value|(% style="width:201px" %)
883		-| |JSON|\<empty\>|(% style="width:384px" %)““|(% style="width:598px" %)NULL or absent|(% style="width:201px" %)(see above)
884		-| |CSV|\<empty\> cell or column is absent|(% style="width:384px" %)~|<empty> cell or column is absent|(% style="width:598px" %)(see above)|(% style="width:201px" %)
	876	+| | |**Dimension value is**| |**Measure, attribute or reference metadata value is**| |
	877	+| | |**Omitted**|**switched off**|**Omitted**|**Present**|
	878	+|Action|Delete|bulk deletion: dimension value doesn't matter|only for irrelevant dimensions:1) higher-level (reference metadata) attributes not attached to this dimension(incl. TIME\_PERIOD)2) measures and attributes not attached to this dimension if the DSD allows for an ‘evolving structure’ (excl. TIME\_PERIOD)|to be deleted only if **all** non-dimension components are omitted|to be deleted|
	879	+| |Merge|*bulk merge is not permitted*|(see above)|not to be changed|to be updated/inserted|
	880	+| |Replace|*bulk replace is not permitted*|(see above)|at permitted replacement levels: to be deleted, otherwise not to be changed|to be updated/inserted|
	881	+|Format|XML|xml element/attribute is absent|~|xml element/attribute is absent|any valid or intentionally missing value|
	882	+| |JSON|\<empty\>|““|NULL or absent|(see above)|
	883	+| |CSV|\<empty\> cell or column is absent|~|<empty> cell or column is absent|(see above)|
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886	886	**Important notes:**
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