Add editorial improvements to CSS ontology generation

Implements suggestions in #327

tools/css-json-to-ttl.js

@@ -17,13 +17,13 @@ console.log(`@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
 @prefix css: <http://www.w3.org/ns/css#> .
 
 <> rdfs:comment """This ontology allows CSS properties to be expressed in RDF.
-The same camelcase convention is usede as is used by the subproperties of the
+The same camelcase convention is used as is used by the subproperties of the
  style property in browser JS implementations.
 
  """ .
  `)
 for (const prop in cssData.properties) {
- const camel = camelCasify(prop)
+ const camel = cssData.properties[prop].styleDeclaration.pop()
  // console.log(` Property ${prop} - ${camel}`)
  console.log(`css:${camel} a rdf:Property; rdfs:label "${prop}"; spec:values`)
 }