Tracker provides nonstandard full-text search capabilities, in order to use these, the string properties can use tracker:fulltextIndexed:
ex:name a rdf:Property; rdfs:domain ex:Mammal; rdfs:range xsd:string; tracker:fulltextIndexed true; tracker:weight 10.
Weighting can also be applied, so certain properties rank higher than others in full-text search queries. With tracker:fulltextIndexed in place, sparql queries may use full-text search capabilities:
SELECT { ?mammal a ex:Mammal; fts:match "timmy" }