1. POSL- An Integrate Positional-Slotted Language for Semantic Web Knowledge
http://ruleml.org/submission/ruleml-shortation.html
2. Units of Measure
http://physics.nist.gov/Pubs/SP811/sec04.html
3. Frank Olken: An Ontology of Measurement Units and Dimensions:
http://ontolog.cim3.net/file/work/OntologySummit2009/OntologySummit2009_Symposium_20090406-07/units-ontology-talk-v01--FrankOlken_20090406.pdf
4. NIST UnitsML:
http://unitsml.nist.gov/Presentations/UnitsML-SCC20.ppt
5. Ontolingua Quantities and Units:
http://www-ksl.stanford.edu/htw/dme/thermal-kb-tour/physical-quantities.html
http://www-ksl.stanford.edu/htw/dme/thermal-kb-tour/standard-units.html
6. Functional-Logic Programming
http://www.cs.unb.ca/~boley/FLP/notes.html