<collation>contains a description of how the leaves or bifolia are physically arranged.
Attributes:
Example
<collation>
<p>The written leaves preceded by an original flyleaf, 
conjoint with the pastedown.</p>
</collation>
Example
<collation>
<p>
<formula>1-5.8 6.6 (catchword, f. 46, does not match following text) 
7-8.8 9.10, 11.2 (through f. 82) 12-14.8 15.8(-7)</formula>
<catchwords>Catchwords are written horizontally in center 
or towards the right lower margin in various manners: 
in red ink for quires 1-6 (which are also signed in red 
ink with letters of the alphabet and arabic numerals); 
quires 7-9 in ink of text within yellow decorated frames; 
quire 10 in red decorated frame; quire 12 in ink of text; 
quire 13 with red decorative slashes; quire 14 added in 
cursive hand.</catchwords>
</p></collation>
Declaration
<!ELEMENT collation  - -  (p+)>

<!ATTLIST	collation	%a.global;>
See further2.6.1. Physical form of the whole ms

Appendix A Reference Documentation for Elements and Classes