Changes for page Part IV. Data and Reference Metadata Namespaces

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852	852	Replacing non-existing elements is not resulting in an error.
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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.
	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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