UNL Ontology
The UNL Ontology, also known as the UW System, is a tree-like structure where UWs are interconnected through ontological relations: icl (is-a-kind-of), iof (is-an-instance-of), equ (is-equivalent-to) and pof (is-a-part-of). The UNL Ontology is claimed to improve the results of the enconversion process, as it can be used as a word sense disambiguation strategy; and the deconversion results, as it would compensate dictionary limitations.
Syntax
The UNL Ontology is a plain text file with a single entry per line. There are two possible representations for UNL Ontology entries: they can be either represented as Master Definitions or as UNL Knowledge Base entries.
When represented as UNLKB entries, the UNL Ontology entries have the following format:
| <UNL Ontology entry> | ::= | <binary relation>"="<degree of certainty> |
| <binary relation> | ::= | {icl, iof, equ, pof} "(" <source node> "," <target node> ")" |
| <source node> | ::= | any existing UW |
| <target node> | ::= | any existing UW |
| <degree of certainty> | ::= | {0,1} |
Where:
0 = false
255 = true
Examples
For the time being, there are two different UNL ontologies:
- A list of UWs provided by the UNL Centre (here presented as a part of the UNL Knowledge Base)
- A list of UWs extracted out of the English WordNet2.1
