compared with
Current by Maria Todorova
on Oct 07, 2011 10:22.

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Open Context implements a subset of the Archaeological Markup Language (ArchaeoML), developed for the University of Chicago OCHRE project. ArchaeoML uses an item-based information model, where individual atomic units of observation are related to each other and their descriptive attributes. Each item does not belong to a predetermined class (pottery, bone, deposit, grave good, etc.), but is, instead, an abstract entity that can have multiple descriptive properties and different forms of linking relations with other items.

(From [OCHRE Project|http://ochre.lib.uchicago.edu/index_files/Page845.htm]:  OCHRE does not impose a standardized terminology. Instead, it provides a [core ontology|http://ochre.lib.uchicago.edu/index_files/Page845.htm] within which each project’s terminology can be expressed. In database parlance, OCHRE has a “global schema” to which many different “local schemas” can be mapped. Unlike most databases, property names and values are not built into the structure of the database as table column headings and table cell values. In OCHRE, descriptive properties (called “attributes” in many database systems) are themselves treated as project-defined “data” within a more abstract structure. Each project can define its own descriptive properties and organize them into a meaningful hierarchy, yielding a project-specific taxonomy.)

There is plan for expression of  ArchaeoML from machine-readbile XML format to RDF-triples using the CIDOC-CRM, though they say that any experts familiar with the CIDOC-CRM can describe relationships among Open Context content using the semantically richer framework of the CIDOC-CRM. See [Open Context Concepts|http://http://opencontext.org/about/concepts].

!OpenContext_Scr3.png|border=1!

- Here is example of CRM ontological model for archaeology information domain, which probably could be presented as a simpler one with Open Context. {viewpdf:name=Ontological Model of Centre for Archaeology Information Domain- AppendixA v9.pdf}

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