Hello Leona,
isn't it possible that your requirement gets out of hand? For example I
add an Item like the following:
<Item iID="1">
<RoleLink iRoleID="X"/>
<RoleLink iRoleID="A"/>
</Item>
and a simple Role like the following:
<Role roleID="A">
<PlayerLink player="1"/>
<PlayerLink player="3"/>
</Role>
A won't be caught in the first run, but maybe it has to, because it's in
the same Item as X. It seems that a recursive approach is needed, isn't it?
Without recursion and not really simpler, but I think more readable and
easier to understand is the following rewriting:
<xsl:variable name="player" select="53"/>
You can pull the root element <Matrix/> into the variable declaration of
$matrix. So you avoid to type it always in the expressions below:
<xsl:variable name="matrix" select="document('matrix.xml')/Matrix"/>
<xsl:variable name="playerroles"
select="$matrix/Role[PlayerLink/@player=$player]"/>
Your expression was:
<xsl:variable name="matrixroles"
select="$matrix/Role[(_at_)roleID = $matrix/Item/RoleLink/@iRoleID
[../../RoleLink/@iRoleID = $playerroles/@roleID]]"/>
rewritten:
<xsl:variable name="matrixroles"
select="$matrix/Role[(_at_)roleID = $matrix/Item
[RoleLink/@iRoleID = $playerroles/@roleID]/RoleLink/@iRoleID]"/>
or adding a new variable for further better readability:
<xsl:variable name="items" select="$matrix/Item[RoleLink/@iRoleID =
$playerroles/@roleID]"/>
<xsl:variable name="matrixroles"
select="$matrix/Role[(_at_)roleID=$items/RoleLink/@iRoleID]"/>
Does this help a bit? And what about my first comment?
Regards,
Joerg
leona s wrote:
Hi All,
I am trying to get a set of nodes that is really an intersection
and would appreciate some ideas for a solution.
What I need is the set of Matrix/Role nodes,
that contains all of Roles for Items
where $player is in at least one of the Roles for that Item.
For example, if I have a variable $player = '53', I
should get the set of Roles where roleID = {W,X,Y}, because
53 is in W and Y, and although 53 is not in X, that Role
is in at least one Item that also has roles W and Y. Also,
53 is in Role Z, but that Role does not belong to any Item so it is not
included.
I have a solution that works, but I was wondering if there is a simpler
way to express this.
<xsl:variable name="player" select="53"/>
<xsl:variable name="matrix" select="document('matrix.xml')"/>
<xsl:variable name="playerroles"
select="$matrix/Matrix/Role[PlayerLink/@player=$player]"/>
<xsl:variable name="matrixroles"
select="$matrix/Matrix/Role[(_at_)roleID=$matrix/Matrix/Item/RoleLink/@iRoleID[..
/../RoleLink/@iRoleID=$playerroles/@roleID]]"/>
<Matrix>
<Role roleID="W">
<PlayerLink player="1"/>
<PlayerLink player="3"/>
<PlayerLink player="6"/>
<PlayerLink player="53"/>
</Role>
<Role roleID="X">
<PlayerLink player="1"/>
<PlayerLink player="3"/>
</Role>
<Role roleID="Y">
<PlayerLink player="1"/>
<PlayerLink player="3"/>
<PlayerLink player="51"/>
<PlayerLink player="53"/>
</Role>
<Role roleID="Z">
<PlayerLink player="3"/>
<PlayerLink player="53"/>
</Role>
<Item iID="123">
<RoleLink iRoleID="W"/>
<RoleLink iRoleID="X"/>
<RoleLink iRoleID="Y"/>
</Item>
<Item iID="456">
<RoleLink iRoleID="X"/>
<RoleLink iRoleID="Y"/>
</Item>
<Item iID="789">
<RoleLink kgRoleID="Y"/>
</Item>
</Matrix>
Thanks very much,
Leona Slepetis
lrs(_at_)realtime(_dot_)net
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