<arc>

<arc> (arc) codifica un arco, cioè il collegamento tra un nodo e l'altro all'interno di un grafo [19.1 Graphs and Digraphs]
Modulo nets — Graphs, Networks, and Trees
Attributi
from⚓︎ assegna un identificatore al nodo non adiacente all'arco
Stato Richiesto
Tipo di dati teidata.pointer
to⚓︎ assegna un identificatore al nodo adiacente all'arco
Stato Richiesto
Tipo di dati teidata.pointer
Contenuto in
nets: graph
Può contenere
core: label
Nota

The arc element must be used if the arcs are labeled. Otherwise, arcs can be encoded using the adj, adjTo and adjFrom attributes on the node tags in the graph. Both arc tags and adjacency attributes can be used, but the resulting encoding would be highly redundant.

Zero, one, or two children label elements may be present. The first occurence of label provides a label for the arc; the second provides a second label for the arc, and should be used if a transducer is being encoded.
Esempio
<arc from="#T3" to="#T3">
 <label>OLD</label>
 <label>VIEUX</label>
</arc>
Content model 
<content>
 <sequence minOccurs="0">
  <elementRef key="label"/>
  <elementRef key="label" minOccurs="0"/>
 </sequence>
</content>
Dichiarazione 
<rng:element name="arc">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.global.rendition.attributes"/>
 <rng:ref name="att.global.linking.attributes"/>
 <rng:ref name="att.global.analytic.attributes"/>
 <rng:ref name="att.global.facs.attributes"/>
 <rng:ref name="att.global.change.attributes"/>
 <rng:ref name="att.global.responsibility.attributes"/>
 <rng:ref name="att.global.source.attributes"/>
 <rng:attribute name="from">
  <rng:ref name="teidata.pointer"/>
 </rng:attribute>
 <rng:attribute name="to">
  <rng:ref name="teidata.pointer"/>
 </rng:attribute>
 <rng:optional>
  <rng:group>
   <rng:ref name="label"/>
   <rng:optional>
    <rng:ref name="label"/>
   </rng:optional>
  </rng:group>
 </rng:optional>
</rng:element>
element arc
{
   att.global.attributes,
   att.global.rendition.attributes,
   att.global.linking.attributes,
   att.global.analytic.attributes,
   att.global.facs.attributes,
   att.global.change.attributes,
   att.global.responsibility.attributes,
   att.global.source.attributes,
   attribute from { teidata.pointer },
   attribute to { teidata.pointer },
   ( label, label? )?
}