Some DTDs and schemas allow for metadata above and beyond that which can be specified by the NCBI Book DTD and NCBI Collection DTDs. This element is a wrapper element used to contain all these additional metadata elements.
<!ELEMENT custom-meta-wrap %custom-meta-wrap-model; >
Custom Metadata <custom-meta>, one or more
<book-meta> Book Metadata; <book-part-meta> Book Part Metadata
...
<book-meta>
...
<custom-meta-wrap>
<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-wrap>
...
</book-meta>
...
common.ent