public void test2()
{
OwlGraph ontology = new OwlGraph();
ontology.NameSpaces["xmlns:" + OwlNamespaceCollection.OwlNamespacePrefix] = OwlNamespaceCollection.OwlNamespace;
ontology.NameSpaces["xmlns:" + OwlNamespaceCollection.RdfSchemaNamespacePrefix] = OwlNamespaceCollection.RdfSchemaNamespace;
ontology.NameSpaces["xmlns:daml"] = "http://www.daml.org/2001/03/daml+oil#";
ontology.NameSpaces["xmlns:dc"] = "http://purl.org/dc/elements/1.1/";
ontology.NameSpaces["xmlns"] = "http://www.owl-ontologies.com/test.owl#";
ontology.NameSpaces["xml:base"] = "http://www.owl-ontologies.com/test.owl";
string baseUri = "http://www.owl-ontologies.com/test.owl#";
OwlOntology o = new OwlOntology(baseUri + "testOntology");
ontology.Nodes.Add(o);
OwlClass a = new OwlClass(baseUri + "ClassA");
ontology.Nodes.Add(a);
OwlClass b = new OwlClass(baseUri + "ClassB");
ontology.Nodes.Add(b);
OwlEdge relation = new OwlEdge(OwlNamespaceCollection.RdfSchemaNamespace + "subClassOf");
relation.AttachParentNode(a);
relation.AttachChildNode(b);
ontology.Edges.Add(relation);
IOwlGenerator generator = new OwlXmlGenerator();
generator.GenerateOwl(ontology, @"c:\example2.owl");
}
/// <summary>
/// Parses the OWL from the given XmlDocument, into an existing graph using the given xml:base uri
/// </summary>
/// <param name="doc">The XmlDocument to use as the source of the XML data</param>
/// <param name="graph">An object that implements the IOwlGraph interface</param>
/// <param name="xmlbaseUri">The xml:base Uri to use incase one is not found in the XML data or the graph</param>
/// <returns>An object that implements the IOwlGraph interface</returns>
public IOwlGraph ParseOwl(XmlDocument doc, IOwlGraph graph, string xmlbaseUri)
{
//parses from the xml document
//if doc is null throws an ArgumentNullException
//looks for xml:base in doc
//if xml:base is not found in doc then uses the xmlbaseUri
//if xmlbaseUri is not a valid Uri it defaults to http://unknown.org/
if(doc == null)
throw(new ArgumentNullException("The specified XmlDocument object is a null reference"));
Warnings.Clear();
Errors.Clear();
//Start with the root
XmlElement root = doc.DocumentElement;
if(root.Name != "rdf:RDF")
{
if(root.Name.ToLower() == "rdf")
OnWarning("Unqualified use of rdf as the root element name.");
else
OnWarning("Root element of an OWL document must be rdf:RDF");
}
string oldXmlbaseUri = null;
if(graph == null)
{
//Now create the OwlGraph
_owlGraph = new OwlGraph();
}
else
{
oldXmlbaseUri = graph.NameSpaces["xml:base"];
graph.NameSpaces.Remove("xml:base");
_owlGraph = graph;
}
//its an OWL Document so now get the namespace info
int count = root.Attributes.Count;
for(int i=0;i<count;i++)
{
try
{
string nsName = root.Attributes[i].Name;
if(_owlGraph.NameSpaces[nsName] != null)
OnWarning("Redefinition of namespace "+nsName);
_owlGraph.NameSpaces[nsName] = root.Attributes[i].Value;
}
catch(ArgumentException ine)
{
OnWarning(ine.Message);
}
}
string xbUri = _owlGraph.NameSpaces["xml:base"];
if(xbUri == null)
{
xbUri = doc.BaseURI;
if(!IsValidUri(xbUri))
{
xbUri = xmlbaseUri;
if(!IsValidUri(xbUri))
{
if(oldXmlbaseUri != null)
xbUri = oldXmlbaseUri;
else
{
OnWarning("Valid xml:base URI not found. Using http://unknown.org/");
xbUri = "http://unknown.org/";
}
}
}
}
//ignore and discard everything after the first # character
int pos = xbUri.IndexOf('#');
if(pos != -1)
{
xbUri = xbUri.Remove(pos,xbUri.Length-pos);
}
//Now finally set the value of the xml:base Uri
_owlGraph.NameSpaces["xml:base"] = xbUri;
if(root.HasChildNodes)
{
count = root.ChildNodes.Count;
for(int i=0;i<count;i++)
{
ProcessNode(root.ChildNodes[i], null);
}
}
return _owlGraph;
}
