public RDFa1(IDocument document)
{
this.document=document;
this.context=new RDFa.EvalContext();
this.context.baseURI=document.getBaseURI();
this.context.namespaces=new PeterO.Support.LenientDictionary<string,string>();
if(!URIUtility.hasScheme(this.context.baseURI))
throw new ArgumentException("baseURI: "+this.context.baseURI);
this.context.parentSubject=RDFTerm.fromIRI(this.context.baseURI);
this.context.parentObject=null;
this.context.iriMap=new PeterO.Support.LenientDictionary<string,string>();
this.context.listMap=new PeterO.Support.LenientDictionary<string,IList<RDFTerm>>();
this.context.incompleteTriples=new List<RDFa.IncompleteTriple>();
this.context.language=null;
this.outputGraph=new HashSet<RDFTriple>();
if(isHtmlElement(document.getDocumentElement(),"html")){
xhtml=true;
}
}