John, Leonid and Andrian,
To summarize our debate about the matter of semantic
layers, please see how the components of real RDF, or World
Description Framework (WDF) may look (comments and modifications are
welcome).
<WDF> :: = <SUO|UFO|ONTAC> <Semantics> <Pragmatics>
<Syntax>
<SUO|UFO (entities, things, beings)> :: = <fundamental classes
(substance, quantity, quality, process> < individuals>
<properties> <relationship> | <axioms> <rules>
<EOL>
<Semantics> :: = < signs> < constructs> < entities>
<EOL>
<Pragmatics> :: = <agent (mental states)> <utterance>
<understanding (communication)> <EOL>
<Syntax (signs, formation and transformation rules> :: = < RDF>
| <N3> < OWL>|... <EOL>
A unifying ontology like Standard Upper Ontology or Unified Framework
Ontology or ONTAC makes the largest meaning context (or the universe of
discourse) involving major kinds of hierarchically ordered extralinguistic
entities, also including psychological factors as mental intentions, agent
profilespeech acts and contents, interaction, human actions, social and
environmental phemonema.
John,
Tried to adapt
on the fly your proposed BNF's syntax, hope missed nothing essential
and the punctuations would be read by the email
program. As i understood, the
idea of this rules come from a syntactic reading of the whole/part
relationships by considering a nonterminal symbol as standing for a complex
entity sequentially divided into parts and subparts. Very
interesting.
with respects to all,