Example: <fsConstraints> (feature-structure constraints)

These search results reproduce every example of the use of <fsConstraints> in the Guidelines, including all localised and translated versions. In some cases, the examples have been drawn from discussion of other elements in the Guidelines and illustrating the use of <fsConstraints> is not the main focus of the passage in question. In other cases, examples may be direct translations of each other, and hence identical from the perspective of their encoding.

18 Feature Structures

18.11.2 The Overall Structure of a Feature System Declaration

<fsDecl type="SomeName">
 <fsDescr>Describes what this type of fs represents</fsDescr>
 <fDecl name="featureOne">
<!-- The declaration for featureOne -->
 </fDecl>
 <fDecl name="featureTwo">
<!-- The declaration for featureTwo -->
 </fDecl>
 <fsConstraints>
<!-- The feature structure constraints go here -->
 </fsConstraints>
</fsDecl>

<fsDecl>

<fsDecl type="SomeName">
 <fsDescr>Describes what this type of fs represents</fsDescr>
 <fDecl name="featureOne">
<!-- The declaration for featureOne -->
  <vRange>
<!-- the range of possible values for this feature -->
  </vRange>
 </fDecl>
 <fDecl name="featureTwo">
<!-- The declaration for featureTwo -->
  <vRange>
<!-- the range of possible values for this feature -->
  </vRange>
 </fDecl>
 <fsConstraints>
<!-- Any additional constraints for the feature structure -->
 </fsConstraints>
</fsDecl>

<fsConstraints>

<fsConstraints>
 <cond>
  <fs>
<!-- ...-->
  </fs>
  <then/>
  <fs>
<!-- ... -->
  </fs>
 </cond>
</fsConstraints>

18.11.5 A Complete Example

<TEI xmlns="http://www.tei-c.org/ns/1.0">
 <teiHeader>
  <fileDesc>
   <titleStmt>
    <title>A sample FSD based on an extract from Gazdar
           et al.'s GPSG feature system for English</title>
    <respStmt>
     <resp>encoded by</resp>
     <name>Gary F. Simons</name>
    </respStmt>
   </titleStmt>
   <publicationStmt>
    <p>This sample was first encoded by Gary F. Simons (Summer
           Institute of Linguistics, Dallas, TX) on January 28, 1991.
           Revised April 8, 1993 to match the specification of FSDs
           in version P2 of the TEI Guidelines. Revised again December 2004 to
           be consistent with the feature structure representation standard
           jointly developed with ISO TC37/SC4.
     </p>
   </publicationStmt>
   <sourceDesc>
    <p>This sample FSD does not describe a complete feature
           system. It is based on extracts from the feature system
           for English presented in the appendix (pages 245–247) of
           Generalized Phrase Structure Grammar, by Gazdar, Klein,
           Pullum, and Sag (Harvard University Press, 1985).</p>
   </sourceDesc>
  </fileDesc>
 </teiHeader>
 <fsdDecl>
  <fsDecl type="GPSG">
   <fsDescr>Encodes a feature structure for the GPSG analysis
         of English (after Gazdar, Klein, Pullum, and Sag)</fsDescr>
   <fDecl name="INV">
    <fDescr>inverted sentence</fDescr>
    <vRange>
     <vAlt>
      <binary value="true"/>
      <binary value="false"/>
     </vAlt>
    </vRange>
    <vDefault>
     <binary value="false"/>
    </vDefault>
   </fDecl>
   <fDecl name="CONJ">
    <fDescr>surface form of the conjunction</fDescr>
    <vRange>
     <vAlt>
      <symbol value="and"/>
      <symbol value="both"/>
      <symbol value="but"/>
      <symbol value="either"/>
      <symbol value="neither"/>
      <symbol value="nor"/>
      <symbol value="or"/>
      <symbol value="NIL"/>
     </vAlt>
    </vRange>
    <vDefault>
     <binary value="false"/>
    </vDefault>
   </fDecl>
   <fDecl name="COMP">
    <fDescr>surface form of the complementizer</fDescr>
    <vRange>
     <vAlt>
      <symbol value="for"/>
      <symbol value="that"/>
      <symbol value="whether"/>
      <symbol value="if"/>
      <symbol value="NIL"/>
     </vAlt>
    </vRange>
    <vDefault>
     <if>
      <fs>
       <f name="VFORM">
        <symbol value="INF"/>
       </f>
       <f name="SUBJ">
        <binary value="true"/>
       </f>
      </fs>
      <then/>
      <symbol value="for"/>
     </if>
    </vDefault>
   </fDecl>
   <fDecl name="AGR">
    <fDescr>agreement for person and number</fDescr>
    <vRange>
     <fs type="Agreement"/>
    </vRange>
   </fDecl>
   <fDecl name="PFORM">
    <fDescr>word form of a preposition</fDescr>
    <vRange>
     <vNot>
      <string/>
     </vNot>
    </vRange>
   </fDecl>
   <fsConstraints>
    <cond>
     <fs>
      <f name="INV">
       <binary value="true"/>
      </f>
     </fs>
     <then/>
     <fs>
      <f name="AUX">
       <binary value="true"/>
      </f>
      <f name="VFORM">
       <symbol value="FIN"/>
      </f>
     </fs>
    </cond>
    <bicond>
     <fs>
      <f name="BAR">
       <symbol value="0"/>
      </f>
     </fs>
     <iff/>
     <fs>
      <f name="N">
       <binary value="true"/>
      </f>
      <f name="V">
       <binary value="true"/>
      </f>
      <f name="SUBCAT">
       <binary value="true"/>
      </f>
     </fs>
    </bicond>
    <cond>
     <fs>
      <f name="BAR">
       <symbol value="1"/>
      </f>
     </fs>
     <then/>
     <fs>
      <f name="SUBCAT">
       <binary value="false"/>
      </f>
     </fs>
    </cond>
   </fsConstraints>
  </fsDecl>
  <fsDecl type="Agreement">
   <fsDescr>This type of feature structure encodes the features
         for subject-verb agreement in English</fsDescr>
   <fDecl name="PERS">
    <fDescr>person (first, second, or third)</fDescr>
    <vRange>
     <vAlt>
      <symbol value="1"/>
      <symbol value="2"/>
      <symbol value="3"/>
     </vAlt>
    </vRange>
   </fDecl>
   <fDecl name="NUM">
    <fDescr>number (singular or plural)</fDescr>
    <vRange>
     <vAlt>
      <symbol value="sg"/>
      <symbol value="pl"/>
     </vAlt>
    </vRange>
   </fDecl>
  </fsDecl>
 </fsdDecl>
</TEI>