Standard: http://www.w3.org/TR/xslt#element-for-each
for-each
Attributes: select
Standard excerpt:
When the result has a known regular structure, it is useful to be able to specify directly the template for selected nodes.
The xsl:for-each instruction contains a template, which is instantiated for each node selected by the expression specified
by the select attribute. The select attribute is required. The expression must evaluate to a node-set. The template is instantiated
with the selected node as the current node, and with a list of all of the selected nodes as the current node list. The nodes
are processed in document order, unless a sorting specification is present
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