xsl:for-each-group

• Like xsl:for-each, but orders elements differently

• Works well with flat structures

• Replaces Muenchian method

• Basic syntax:

  <xsl:for-each-group
    select = expression
    group-by = "string expression"
    group-adjacent = "string expression"
    group-starting-with = pattern>
    <!-- Content: (xsl:sort*, content-constructor) -->
  </xsl:for-each-group>

• The select attribute selects the population to be grouped.

• The group-by attribute calculates a string value for each node in the population. Nodes with the same value are grouped together.

• The group-adjacent attribute calculates a string value for each node in the population. Every time the value changes, a new group is started.

• The group-starting-with starts a new group every time its pattern is matched.

• group-by, group-adjacent, and group-starting-with are mutually exclusive.