Some tag sets allow for metadata beyond that which is named by the Book Tag Sets. This element is used to contain these additional elements.
This element (<custom-meta-group>) has been significantly remodeled in version 3.0 of the Tag Set. The values and/or usage in version 3.0 are not backward-compatible with that in previous versions of the Tag Set. Specifically, the <custom-meta-group> element replaces the <custom-meta-wrap> element, which is no longer available.
<!ELEMENT custom-meta-group %custom-meta-group-model; >
(custom-meta+)
<custom-meta> Custom Metadata, one or more
...
<book-meta>
...
<custom-meta-group>
<custom-meta>
<meta-name>acidfree</meta-name>
<meta-value>yes</meta-value>
</custom-meta>
<custom-meta>
<meta-name>price</meta-name>
<meta-value>US $28.50</meta-value>
</custom-meta>
<custom-meta>
<meta-name>miscinfo</meta-name>
<meta-value>CDs included, Windows XP required; 1GB processor,
512 MB RAM recommended</meta-value>
</custom-meta>
</custom-meta-group>
...
</book-meta>
...
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