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POString manipulation in RDF/OWL
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copied!<p>A Beginner question about the semantic web.</p> <p>I have a knowledge base of colors which includes similar colors, color modifiers (dark, light, ~ish, etc), color relations (darker, brighter), color synonyms, etc. I am trying to figure out if RDF/OWL is a good choice to manipulate (mainly query) this KB. Here are the queries I need to support.</p> <p>1) Find all colors similar to a given color. If I represent color similarity with a "similar" predicate, a simple Sparql query will do. Same for synonyms and relations. Good.</p> <p>2) The problem becomes more tricky when I need to find if a token or phrase x is a valid color. If x is an unmodified color, the problem can be solved by creating a Color class and making sure all the known colors are instances of that class. But what if x is a modified color like "redish" ? Obviously, one solution would be to have all the modified colors part of the KB by adding them explicitly.</p> <p>But, is it possible to add all the modified colors automatically to the RDF? In other words, is it possible to define a class of modified colors that would entail all modified colors? This requires some concatenation operator. Is that at all possible?</p> <p>Another solution would be to have some logic to decompose x and check a) if it contains a known modifier and b) if the modified thing is a valid color. Of course, I'd like this logic to be described in RDF/OWL as well. Any idea?</p> <p>Thanks in advance for any input or suggestion.</p>

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