<!-- DTD for Underspecified Rhethorical Structure Trees -->
<!-- Version 0.5 Jan05 2002 - Reitter - reitter@mle.media.mit.edu -->

<!ENTITY markup "((#PCDATA)*)">

<!ELEMENT urml (header, document*)>

<!ENTITY % reltype "(par|hyp)">

<!ELEMENT header (reltypes)>
<!ELEMENT reltypes (rel)*>
<!ELEMENT rel EMPTY>
<!ATTLIST rel
name	  CDATA	#REQUIRED
type	%reltype;	#REQUIRED >

 
<!ELEMENT document (info?,text,analysis+)*>
<!ATTLIST document
	id	ID	#IMPLIED
	lang   CDATA   #IMPLIED>
<!-- language follows the iso639 stanard: en, de, fr, es etc. -->

<!ELEMENT info (source?, editor*, note?)>
<!ELEMENT source ANY> <!-- Source of the doc/analysis -->
<!ELEMENT editor (#PCDATA)>  <!-- Who inserted the doc, created the analysis? -->
<!ATTLIST editor
	job	CDATA	#REQUIRED
	date	CDATA	#IMPLIED>
<!ELEMENT note ANY> <!-- Any additional notes -->


<!ELEMENT text (segment|unsegmented|ignore)*>  <!-- The text of a document -->
	
<!ELEMENT ignore (#PCDATA)> <!-- Data decided to be unimportant -->
<!ELEMENT segment (#PCDATA|p)*> <!-- A minimal unit of discourse -->
<!ATTLIST segment
	id	ID	#REQUIRED>
<!ELEMENT unsegmented (#PCDATA|p)*>  <!-- Text that has not been segmented yet -->


<!ELEMENT br EMPTY>
<!-- paragraph delimiter - refers to layout
	-->

	
<!-- a distinct analysis of the text. -->
<!ELEMENT analysis (info?, (hypRelation|parRelation|relation|span)*)>
<!ATTLIST analysis
status	CDATA	#IMPLIED
id	ID	#IMPLIED
score	CDATA	#IMPLIED   
>

<!-- paratactic (multi-nuclear) relation -->
<!ELEMENT parRelation ((nucleus|element)*)>
<!ATTLIST parRelation
type	CDATA	#REQUIRED
id	ID	#REQUIRED
score	CDATA	#IMPLIED   
>
<!-- if type is unspecified: unknown paratactic relation -->


<!-- hypotactic (nucleus-satellite) relation -->
<!ELEMENT hypRelation (((satellite|element),(nucleus|element))|((nucleus|element),(satellite|element)))>
<!ATTLIST hypRelation
type	CDATA	#IMPLIED   
id	ID	#REQUIRED
score	CDATA	#IMPLIED   
>
<!-- if type is unspecified: unknown hypotactic relation -->

<!ELEMENT relation (((satellite|element),(nucleus|element))|((nucleus|element),(satellite|element))|((nucleus|element)*))>
<!ATTLIST relation
type	CDATA	#IMPLIED
id	ID	#REQUIRED
score	CDATA	#IMPLIED   
group	ID	#IMPLIED
>
<!-- if type is unspecified: unknown relation -->

<!-- satellite role -->
<!ELEMENT satellite EMPTY>
<!ATTLIST satellite
id	IDREF	#REQUIRED>		<!-- IDREF -->

<!-- nucleus role -->
<!ELEMENT nucleus EMPTY>
<!ATTLIST nucleus
id	IDREF	#REQUIRED>		<!-- IDREF -->

<!-- unknown element role -->
<!ELEMENT element EMPTY>
<!ATTLIST element
id	IDREF	#REQUIRED>		<!-- IDREF -->

<!-- If a satellite or nucleus consists of more than a single relation, 
      the group of elements may be assigned an ID to be referenced using
      the group attribute. -->