Sorting
- choosing order for xsl:apply-templates and xsl:for-each
(default: document order)
- <xsl:sort select="expression" .../>
- sequence of xsl:sort placed in
xsl:apply-templates or xsl:for-each defining
lexicographic order (first occuring: primary key, etc.) -
expression evaluated on each node in node-set,
result converted to string for comparison
Extra attributes:
- order="ascending/descending"
- lang="..."
- data-type="text/number"
- case-order="upper-first/lower-first"
