|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
• |
Multiple
contexts, views, application
& user
|
|
perspectives
|
|
|
• |
Multiple
levels of precision, specification,
|
|
|
definiteness
required
|
|
|
• |
Multiple
levels of semantic model
|
|
|
verisimilitude, fidelity, granularity
|
|
|
• |
Multiple
kinds of semantic mappings,
|
|
|
transformations
needed:
|
|
|
|
– |
Entities,
Relations, Properties, Ontologies, Model
|
|
|
Modules,
Namespaces, Meta-Levels, Facets (i.e.,
|
|
|
properties of
properties), Units of Measure,
|
|
|
Conversions, etc.
|
|
|
|