Digging variant with tolog

[Pierre Thibault]

In 'opera.ltm' the topic of city is quite rich:

  <topic>
    <subjectIdentifier href="http://psi.ontopedia.net/City"></subjectIdentifier>
    <name>
      <scope>
        <subjectIdentifierRef href="http://www.topicmaps.org/xtm/1.0/language.xtm#cs"></subjectIdentifierRef>
      </scope>
      <value>Město</value>
      <variant>
        <scope>
          <subjectIdentifierRef href="http://www.topicmaps.org/xtm/1.0/language.xtm#cs"></subjectIdentifierRef>
          <subjectIdentifierRef href="http://www.topicmaps.org/xtm/1.0/core.xtm#sort"></subjectIdentifierRef>
        </scope>
        <resourceData>Mesto</resourceData>
      </variant>
    </name>
    <name>
      <scope>
        <subjectIdentifierRef href="http://www.topicmaps.org/xtm/1.0/language.xtm#no"></subjectIdentifierRef>
      </scope>
      <value>By</value>
    </name>
    <name>
      <scope>
        <subjectIdentifierRef href="http://www.topicmaps.org/xtm/1.0/language.xtm#de"></subjectIdentifierRef>
      </scope>
      <value>Stadt</value>
    </name>
    <name>
      <scope>
        <subjectIdentifierRef href="http://www.topicmaps.org/xtm/1.0/language.xtm#fr"></subjectIdentifierRef>
      </scope>
      <value>Ville</value>
    </name>
    <name>
      <scope>
        <subjectIdentifierRef href="http://www.topicmaps.org/xtm/1.0/language.xtm#it"></subjectIdentifierRef>
      </scope>
      <value>Città</value>
      <variant>
        <scope>
          <subjectIdentifierRef href="http://www.topicmaps.org/xtm/1.0/language.xtm#it"></subjectIdentifierRef>
          <subjectIdentifierRef href="http://www.topicmaps.org/xtm/1.0/core.xtm#sort"></subjectIdentifierRef>
        </scope>
        <resourceData>Citta</resourceData>
      </variant>
    </name>
    <name>
      <value>City</value>
      <variant>
        <scope>
          <subjectIdentifierRef href="http://psi.ontopedia.net/plural"></subjectIdentifierRef>
        </scope>
        <resourceData>Cities</resourceData>
      </variant>
    </name>
  </topic>

Is it possible to write a tolog query to access the <resourceData>Cities</resourceData> giving "Cities" as a result?

[Dan Speck]

Pierre,

I thought that this would be easier but the documentation IMHO is incomplete. Here is my solution:

using ont for i"http://psi.ontopedia.net/"

select $T, $TNAME, $VARIANT, $VNAME, $SCOPE from
  $T = ont:City,
  $SCOPE = plural,
  topic-name($T, $TNAME),
  variant($TNAME, $VARIANT),
  scope($VARIANT, $SCOPE),
  value($VARIANT, $VNAME)
?

The documentation of variant() in the Built-in tolog Predicates Manual (http://www.ontopia.net/omnigator/docs/query/predicate-reference.html#p-variant) is misleading as it doesn't really show how to obtain the topic name variant in a given scope.

-dan

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[Pierre Thibault]

Thank you Dan,

I had to slightly modify the query to make it work:

select $T, $TNAME, $VARIANT, $VNAME, $SCOPE from

  $T = city,

  $SCOPE = plural,
  topic-name($T, $TNAME),
  variant($TNAME, $VARIANT),
  scope($VARIANT, $SCOPE),
  value($VARIANT, $VNAME)
?