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D.4.5 The extension Element

This is a general-purpose “extension” element. Readers that don’t understand a given extension should be able to safely ignore it. The attributes on this element, and their meanings, vary based on the context. Each known usage is described separately below. The current extensions use attributes exclusively, without any nested elements.

visualization Parent Element

With visualization as its parent element, extension has the following attributes.

Optional: numRows

An integer that presumably defines the number of rows in the displayed pivot table.

Optional: showGridline

Always set to false in the corpus.

Optional: minWidthSet
Optional: maxWidthSet

Always set to true in the corpus.

container Parent Element

With container as its parent element, extension has the following attributes.

Required: combinedFootnotes

Always set to true in the corpus.

sourceVariable and derivedVariable Parent Element

With sourceVariable or derivedVariable as its parent element, extension has the following attributes. A given parent element often contains several extension elements that specify the meaning of the source data’s variables or sources, e.g.

<extension from="0" helpId="corrected_model"/>
<extension from="3" helpId="error"/>
<extension from="4" helpId="total_9"/>
<extension from="5" helpId="corrected_total"/>
Required: from

An integer or a name like “dimension0”.

Required: helpId

An identifier.