Here is a snippet with an entry from a descriptive bibliography, using <div type="entry"> as the entry level element. Within the div, this example uses <biblStruct> for the bibliographic info and <msDesc> for collation, physical description, and provenance. The annotation in this case is using the <summary> element within <msDesc>, but I am leaning toward a third element after <msDesc> for annotations. The published entry should look something like this: