imported>Martins at 18:06, 16 August 2013

2013-08-16T18:06:57Z

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	'''UNL sentences''', or UNL expressions, are sentences of UNL. They are hypergraphs made out of nodes ([[Universal Words]]) interlinked by binary semantic [[~~relations~~]] and modified by [[~~attributes~~]]. UNL sentences have been the basic unit of representation inside the UNL framework.		'''UNL sentences''', or UNL expressions, are sentences of UNL. They are hypergraphs made out of nodes ([[Universal Words]]) interlinked by binary semantic [[Universal Relations]] and modified by [[Universal Attributes]]. UNL sentences have been the basic unit of representation inside the UNL framework.

	== Syntax ==		== Syntax ==

imported>Admin at 12:56, 21 April 2009

2009-04-21T12:56:20Z

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imported>Admin at 14:32, 16 April 2009

2009-04-16T14:32:17Z

New page

'''UNL sentences''', or UNL expressions, are sentences of UNL. They are hypergraphs made out of nodes ([[Universal Words]]) interlinked by binary semantic [[relations]] and modified by [[attributes]]. UNL sentences have been the basic unit of representation inside the UNL framework.

== Syntax ==

According to the [[Specs|UNL Specs]], there are two different ways of representing UNL sentences: the table format and the list format. In the list format, UWs and relations are represented separately; in the table format, they constitute a single structure.

=== List Format ===

The syntax for UNL sentences in the list format is the following:

{|
|<UNL sentence>
|::=
|"[W]" <list of UWs> "[/W]" [ "[R]" <list of relations> "[/R]" ]
|-
|<list of UWs>
|::=
|<UW+attributes> [<UW+attributes>...]
|-
|<UW+attributes>
|::=
|<UW>{“:”<Scope-ID>}}[<attribute list>]”:”<UW-ID>
|-
|<list of relations>
|::=
|<binary relation>[<binary relation>...]
|-
|<binary relation>
|::=
|<source node><relation[":"<Scope-ID>]<target node>
|-
|<source node>
|::=
|<UW-ID>
|-
|<target node>
|::=
|<UW-ID>
|}

=== Table Format ===

The syntax for UNL sentences in the table format is the following:

{|
|<UNL sentence>
|::=
|<list of relations>
|-
|<list of relations>
|::=
|<binary relation>[<binary relation>...]
|-
|<binary relation>
|::=
|<relation> [“:”<Scope-ID>] “(“ <source node> , <target node> ")"
|-
|<source node>
|::=
|<UW+attributes>
|-
|<target node>
|::=
|<UW+attributes>
|-
|<UW+attributes>
|::=
|<UW>{“:”<Scope-ID>}}[<attribute list>]”:”<UW-ID>
|}

Where 
" and " indicate a predefined delimiter 
< and > indicate a non-terminal symbol 
{ and } indicate a range 
[ and ] indicate an omissible part 
... indicates more than 0 times repetition of the front part 
<nowiki>::= indicates the left part can be replaced by the right part </nowiki>

UNL sentence - Revision history

imported>Martins at 18:06, 16 August 2013

imported>Admin at 12:56, 21 April 2009

imported>Admin at 14:32, 16 April 2009