Spotting and Searching Quantity Expressions technical/scientific documents (towards a physics search engine)
KWARC group has converted the Cornell EPrint arXiv (> 1.1 Million papers in physics, maths, CS, etc) into HTML5. This resource contains millions of quantity expressions like "3m/s" , "13 square mile feet", or "five astronomical units". One step towards a "physics search engine" would be to make those searchable as quantity expressions, i.e. if we could find "3m/s" by searching for "10.8 km/h" or "?x furlongs per fortnight" - independently of the unit used to represent the quantity. We have most of the parts needed for such a search engine; here is what would be needed to build it: