Conditional Mapping In XSLT

[twitherspoon]

I want to know how to conditional map a group over if and only if an element in the source equals a certain value. How would I do that? I have a small example below and for example I want to map this over to a similiar XML Doc, but only show the teams with 2 or more allstars.

<nba_teams>
<team>
<team_name>LA Lakers</team_name>
<members allstar=&quot;true&quot;>
<name>Shaq</name>
</members>
<members> allstar=&quot;true&quot;>
<name>Kobe</name>
</members>
</team>
<team>
<team_name>Dallas Mavericks</team_name>
<members allstar=&quot;true&quot;>
<name>Dirk</name>
</members>
<members> allstar=&quot;false&quot;>
<name>Steve</name>
</members>
</team>
</nba_teams>