<purpose>

<purpose> caracteriza una única finalidad o función comunicatica del texto. 15.2.1 The Text Description
Módulo corpus — 15 Language Corpora
Además de los atributos globales
type especifica un tipo particular de finalidad
Estado Opcional
Tipo de datos 

<rng:ref name="data.enumerated"/>
data.enumerated
Los valores sugeridos incluyen:
persuade
didáctico, publicidad, propaganda, etc.
express
expresión de uno mismo, confesonario, etc.
inform
informativo, educativo, etc.
entertain
divertimento, entretenimiento, etc.
degree especifica el alcance en que predomina este propósito.
Estado Opcional
Tipo de datos 

<rng:ref name="data.certainty"/>
data.certainty
Usado por
textDesc
Puede contener
analysis: interp interpGrp span spanGrp
certainty: certainty precision respons
core: abbr address cb choice date distinct email emph expan foreign gap gloss index lb measure measureGrp mentioned milestone name note num pb ptr ref rs soCalled term time title
dictionaries: lang
figures: figure
header: idno
iso-fs: fLib fs fvLib
linking: alt altGrp anchor join joinGrp link linkGrp timeline
msdescription: catchwords depth dim dimensions height heraldry locus locusGrp material origDate origPlace secFol signatures stamp watermark width
namesdates: addName affiliation bloc country district forename genName geo geogFeat geogName nameLink offset orgName persName placeName region roleName settlement state surname
spoken: incident kinesic pause shift vocal writing
tagdocs: att code gi ident tag val
textcrit: witDetail
transcr: addSpan am damageSpan delSpan ex fw handShift space subst
Declaración 

<rng:element name="purpose">
 <rng:ref name="att.global.attributes"/>
 <rng:optional>
  <rng:attribute name="type">
   <rng:choice>
    <rng:value>persuade</rng:value>
    <rng:value>express</rng:value>
    <rng:value>inform</rng:value>
    <rng:value>entertain</rng:value>
    <rng:data type="Name"/>
   </rng:choice>
  </rng:attribute>
 </rng:optional>
 <rng:optional>
  <rng:attribute name="degree">
   <rng:ref name="data.certainty"/>
  </rng:attribute>
 </rng:optional>
 <rng:ref name="macro.phraseSeq.limited"/>
</rng:element>
element purpose
{
   att.global.attributes,
   attribute type
   {
      "persuade" | "express" | "inform" | "entertain" | xsd:Name
   }?,
   attribute degree { data.certainty }?,
   macro.phraseSeq.limited
}
Ejemplo
<purpose type="persuade" degree="high"/>
<purpose type="entertain" degree="low"/>