DAML Homework Assignment 1 "Quick Look"
*DRAFT* version for DAML Language Committee telecon
This page presents an initial look at the DAML ontologies and content pages
developed by DAML program participants for
DAML Homework Assignment 1.
A summary of all pages is available
here.
All submitted ontologies have been added to the
DAML Ontology Library.
Statistics
50 ontologies submitted to date (3 groups haven't submitted yet).
Those ontologies define 646+ classes and 812+ properties
(several ontologies don't parse yet using RDF API
-- I'm contacting those groups).
45 content roots were submitted.
We plan to automatically collect more statistics on statement counts, etc.
Use of Language Features
- daml-ont:List
- SRI *.daml
- Teknowledge Palo Alto Ontology.daml
- BAH personal-info.daml
- multiple inheritance
- CMU atlas-employment_categories.daml#Research
- subPropertyOf
- Teknowledge LA ResearchProjectOntology.daml
- DRC *.daml
- daml:restrictedBy
- Stanford DB swrc-onto-2000-09-10.daml
- CMU atlas-date.daml
- SRI *.daml
- Literal typing
- CMU atlas-date.daml uses http://www.daml.org/2000/10/daml-num.daml#Integer
- BBN projects-20000911.daml uses http://www.w3.org/TR/1999/PR-rdf-schema-19990303#Literal [old URI for RDFS, currently RDF API]
- SRI *.daml uses http://www.w3.org/2000/01/rdf-schema#Literal
- BAH personal-info.daml and Stanford DB swrc-onto-2000-09-10.daml uses http://www.w3.org/TR/xmlschema-2/#string [new URI for RDFS]
- Stanford KSL ksl-daml-desc.daml defines and uses Classes #STRING and #INTEGER
[Doesn't this imply that these are Resources rather than Literals?]
- UMBC talk-ont.daml defines and uses Classes #String and #Integer
[Doesn't this imply that these are Resources rather than Literals?]
- equivalentTo
- UMBC talk-ont.daml
- LM M&DS ubot-ont.daml
- SRI *.daml
- Teknowledge Palo Alto Ontology.daml
- oneOf
- DRC *.daml
- Teknowledge LA ResearchProjectOntology.daml
- CMU *.daml
Naming
A subsequent draft will include the URIs each organization
used to refer to its project and/or organization.
Lessons Learned
The following issues were addressed by 2 or more of the groups
in their lessons learned:
- lists: BAH, SRI, Stanford KSL, Teknowledge Palo Alto
- UML: GRCI, LM M&DS
- naming: Stanford DB, BBN, UMBC
- placement: UMBC, BBN, ...
- documentation/examples:
Emerging Best Practices
- Adopt RDF capitalization conventions:
- use full words
- capitalize first letter for classes, lowercase first letter for properties
- capitalize first letter of each subsequent word
- no _'s or other punctuation.
- Separate Class/Property and instance definitions.
- Almost everyone did this.
- Teknowledge Palo Alto Ontology.daml defines SoftwareDevelopmentBusiness, BusinessUnit, and Person instances as part of their ontology.
- Probably want some naming convention to distinguish DAML files containing DAML ontologies from those containing content
- BBN projects-20000911.daml
- ISI *.o.daml, *.d.daml
- DRC *-ont.daml
- Use subProperties rather than properties on intermediate objects to distinguish roles, etc.,
- Teknowledge LA ResearchProjectOntology.daml#isPrincipalInvestigator subproperty of #inProject.
Problems
- homework/assignment.html has bad syntax for associating an Action instance
with an ActionItem (what was I thinking?).
SRI *-homepage.daml may have copied this in associating researcher:department, org:name, and contactinfo with Researchers
- BAH personal-info.daml uses cardinality and maxCardinality as attributes of
rdfs:Property
- CMU atlas-cmu.daml uses disjoin within Organization;
presumably this should be disjointUnionOf.
Note: daml-ex.daml uses disjointFrom, which is not defined in daml-ont.daml.
- GRCI ProjectOntology.daml uses 'String' and 'Integer' as Property range's
- Teknowledge LA ResearchProjectOntology.daml uses subproperty rather than subPropertyOf
- UMBC talk-ont.daml has Property definitions within Class definitions, and is not parsable by RDF API
Other Issues
- Some Researchers in SRI *-homepage.daml don't have IDs,
making them hard to reference later.
- No general means to embed RDF in HTML for IE 5?
$Id: 2000-11-07-quicklook.html,v 1.1 2000/11/22 21:39:34 mdean Exp $