> The first match finds foo elements that have a bar attribute.
> The third match finds children of foo elements that have a bar attribute.

No.

the first finds foo elements that have are children of the current
node, and have a bar attribute
the second finds bar attributes of foo children of the current node.

if this is in an apply-templates, then the current node in the matching
template will be the foo element in the first case but an _attribute
node_ in the second.

David


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