QUOTE
sort_order=``ascend|descend''
Specifies the sort order for this particular tag; this can be used to override the globally set Sort Order for Entries, set in your weblog configuration. Valid values are ascend and descend.
In this context, ascend and descend do not mean only chronological order; this attribute can be used along with sort_by (below) to sort, for example, by entry title, either A to Z (ascend), or Z to A (descend).
The default value is descend.
QUOTE
sort_by=``field name''
Sort by a field other than the Authored On Date of the entry. Valid values for field name are title, status, modified_on, author_id, or excerpt.
The most obvious use of this attribute might be to alphabetize your entries, rather than displaying them chronologically. For example, suppose that you are using Movable Type to display a dictionary site. You might wish to group your entries by letter, so you could create 26 categories, A through Z. To build a list of all of the entries in your dictionary, grouped by letter, and sorted alphabetically (assuming that you have entered the word or phrase as the title of each entry), you could do this:
CODE
<MTCategories>
<$MTCategoryLabel$><br />
<MTEntries sort_by="title" sort_order="descend">
<a href="<$MTEntryPermalink$>"><$MTEntryTitle$></a><br />
</MTEntries><br />
</MTCategories>