|
|
| (13 intermediate revisions by the same user not shown) |
| Line 1: |
Line 1: |
| The following Grammar Specs are used for writing rules for the UNDL Foundation tools ([[IAN]], [[EUGENE]], [[SEAN]], [[NORMA]], etc.).
| | #REDIRECT [[Grammar]] |
| | |
| == Basic symbols ==
| |
| {{:Basic Symbols}}
| |
| | |
| == Basic concepts ==
| |
| ;[[Node]]
| |
| :A node is the most elementary unit in the graph. It is the result of the [[tokenization]] process, and corresponds to the notion of "lexical item". At the surface level, a natural language sentence is considered a list of nodes, and a UNL graph a set of relations between nodes.
| |
| ;[[Relation]]
| |
| :In order to form a natural language sentence or a UNL graph, nodes are inter-related by relations. In the UNL framework, there can be three different types of relations: linear, syntactic or semantic.
| |
| ;[[Hyper-Node]]
| |
| :A hyper-node is a sub-graph, i.e., a node containing relations between nodes.
| |
| ;[[Hyper-Relation]]
| |
| :A hyper-relation is a relation between relations.
| |
