[WM] sitemap grep attribute

[alex canady]

its me again ... this time i looked through the
archives and don't think it's addressed anywhere.

i am working with the sitemap thingy and seem to have
it working in its default behavior, i.e.:

Section 1
  Section 1 Subsection 1
  Section 1 Subsection 2
Section 2
 Section 2 Subsection 1
 Section 2 Subsection 2

however what i really want is to only render the site
map for the top level nodes and then the parent nodes
of the current page, so if we were on subsection 1 of
section 1:

Section 1
 Section 1 Subsection 1
Section 2

i think this may be possible with the grep attribute
of the sitemap function, however i can't find any
examples of it anywhere and the documentation only has
a little blurb about it.  

what i can't figure out is where the $_ is in
relationship to the overall processing of the sitemap
rendering code - confusing i know.  i need to know
what i can compare $_ (the current content name) to ??


if the node is for the current content ($_) then draw
it.
if the node is a parent for the current content then
draw the node.
if the node is a top level node then draw the node.

but all i have to work with is $_ (the content name,
not the node).  

is this the right logic or am i just going down the
wrong path?

regards,

alex


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