/// <summary>
/// Gives the collection of "xmlns" attributes of the "rdf:RDF" root node
/// </summary>
internal static XmlAttributeCollection GetXmlnsNamespaces(XmlNode rdfRDF, XmlNamespaceManager nsMgr)
{
XmlAttributeCollection xmlns = rdfRDF.Attributes;
if (xmlns != null && xmlns.Count > 0)
{
IEnumerator iEnum = xmlns.GetEnumerator();
while (iEnum != null && iEnum.MoveNext())
{
XmlAttribute attr = (XmlAttribute)iEnum.Current;
if (attr.LocalName.ToUpperInvariant() != "XMLNS")
{
//Try to resolve the current namespace against the namespace register;
//if not resolved, create new namespace with scope limited to actual node
RDFNamespace ns =
(RDFNamespaceRegister.GetByPrefix(attr.LocalName) ??
RDFNamespaceRegister.GetByNamespace(attr.Value) ??
new RDFNamespace(attr.LocalName, attr.Value));
nsMgr.AddNamespace(ns.Prefix, ns.Namespace.ToString());
}
}
}
return(xmlns);
}
/// <summary>
/// Default-ctor to initialize the singleton instance of the register
/// </summary>
static RDFNamespaceRegister()
{
RDFNamespace rdfsharp = new RDFNamespace(RDFVocabulary.RDFSHARP.PREFIX, RDFVocabulary.RDFSHARP.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.RDFSHARP.DEREFERENCE_URI));
Instance = new RDFNamespaceRegister()
{
Register = new List <RDFNamespace>()
{
rdfsharp,
//Basic
new RDFNamespace(RDFVocabulary.RDF.PREFIX, RDFVocabulary.RDF.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.RDF.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.RDFS.PREFIX, RDFVocabulary.RDFS.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.RDFS.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.OWL.PREFIX, RDFVocabulary.OWL.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.OWL.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.SHACL.PREFIX, RDFVocabulary.SHACL.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.SHACL.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.XSD.PREFIX, RDFVocabulary.XSD.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.XSD.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.XML.PREFIX, RDFVocabulary.XML.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.XML.DEREFERENCE_URI)),
//Extended
new RDFNamespace(RDFVocabulary.DC.PREFIX, RDFVocabulary.DC.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.DC.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.DC.DCAM.PREFIX, RDFVocabulary.DC.DCAM.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.DC.DCAM.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.DC.DCTERMS.PREFIX, RDFVocabulary.DC.DCTERMS.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.DC.DCTERMS.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.DC.DCTYPE.PREFIX, RDFVocabulary.DC.DCTYPE.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.DC.DCTYPE.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.FOAF.PREFIX, RDFVocabulary.FOAF.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.FOAF.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.GEO.PREFIX, RDFVocabulary.GEO.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.GEO.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.SIOC.PREFIX, RDFVocabulary.SIOC.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.SIOC.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.SKOS.PREFIX, RDFVocabulary.SKOS.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.SKOS.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.SKOS.SKOSXL.PREFIX, RDFVocabulary.SKOS.SKOSXL.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.SKOS.SKOSXL.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.EARL.PREFIX, RDFVocabulary.EARL.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.EARL.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.CRM.PREFIX, RDFVocabulary.CRM.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.CRM.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.DOAP.PREFIX, RDFVocabulary.DOAP.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.DOAP.DEREFERENCE_URI)),
new RDFNamespace(RDFVocabulary.VS.PREFIX, RDFVocabulary.VS.BASE_URI).SetDereferenceUri(new Uri(RDFVocabulary.VS.DEREFERENCE_URI))
}
};
DefaultNamespace = rdfsharp;
}
/// <summary>
/// Finds if the given token contains a recognizable namespace and, if so, abbreviates it with its prefix.
/// It also prepares the result in a format useful for serialization.
/// </summary>
internal static String AbbreviateNamespace(String token)
{
//Null or Space token: it's a trick, give empty result
if (token == null || token.Trim() == String.Empty)
{
return(String.Empty);
}
//Blank token: abbreviate it with "_"
if (token.StartsWith("bnode:"))
{
return(token.Replace("bnode:", "_:"));
}
//Prefixed token: check if it starts with a known prefix, if so just return it
if (RDFNamespaceRegister.GetByPrefix(token.Split(':')[0]) != null)
{
return(token);
}
//Uri token: search a known namespace, if found replace it with its prefix
String tokenBackup = token;
Boolean abbrev = false;
RDFNamespaceRegister.Instance.Register.ForEach(ns => {
if (!abbrev)
{
String nS = ns.ToString();
if (!token.Equals(nS, StringComparison.OrdinalIgnoreCase))
{
if (token.StartsWith(nS))
{
token = token.Replace(nS, ns.NamespacePrefix + ":").TrimEnd(new Char[] { '/' });
//Accept the abbreviation only if it has generated a valid XSD QName
try {
var qn = new RDFTypedLiteral(token, RDFModelEnums.RDFDatatypes.XSD_QNAME);
abbrev = true;
}
catch {
token = tokenBackup;
abbrev = false;
}
}
}
}
});
//Search done, let's analyze results:
if (abbrev)
{
return(token); //token is a relative or a blank uri
}
if (token.Contains("^^")) //token is a typedLiteral absolute uri
{
return(token.Replace("^^", "^^<") + ">");
}
return("<" + token + ">"); //token is an absolute uri
}
/// <summary>
/// Default-ctor to initialize the singleton instance of the register
/// </summary>
static RDFNamespaceRegister()
{
Instance = new RDFNamespaceRegister();
Instance.Register = new List <RDFNamespace>();
SetDefaultNamespace(new RDFNamespace("rdfsharp", "https://rdfsharp.codeplex.com/default_graph#"));
#region Basic Namespaces
//xsd
AddNamespace(new RDFNamespace(RDFVocabulary.XSD.PREFIX, RDFVocabulary.XSD.BASE_URI));
//xml
AddNamespace(new RDFNamespace(RDFVocabulary.XML.PREFIX, RDFVocabulary.XML.BASE_URI));
//rdf
AddNamespace(new RDFNamespace(RDFVocabulary.RDF.PREFIX, RDFVocabulary.RDF.BASE_URI));
//rdfs
AddNamespace(new RDFNamespace(RDFVocabulary.RDFS.PREFIX, RDFVocabulary.RDFS.BASE_URI));
//owl
AddNamespace(new RDFNamespace(RDFVocabulary.OWL.PREFIX, RDFVocabulary.OWL.BASE_URI));
#endregion
#region Extended Namespaces
//foaf
AddNamespace(new RDFNamespace(RDFVocabulary.FOAF.PREFIX, RDFVocabulary.FOAF.BASE_URI));
//skos (and extensions)
AddNamespace(new RDFNamespace(RDFVocabulary.SKOS.PREFIX, RDFVocabulary.SKOS.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.SKOS.SKOSXL.PREFIX, RDFVocabulary.SKOS.SKOSXL.BASE_URI));
//dc (and extensions)
AddNamespace(new RDFNamespace(RDFVocabulary.DC.PREFIX, RDFVocabulary.DC.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.DC.DCAM.PREFIX, RDFVocabulary.DC.DCAM.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.DC.DCTERMS.PREFIX, RDFVocabulary.DC.DCTERMS.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.DC.DCTYPE.PREFIX, RDFVocabulary.DC.DCTYPE.BASE_URI));
//geo
AddNamespace(new RDFNamespace(RDFVocabulary.GEO.PREFIX, RDFVocabulary.GEO.BASE_URI));
//sioc
AddNamespace(new RDFNamespace(RDFVocabulary.SIOC.PREFIX, RDFVocabulary.SIOC.BASE_URI));
//og (and extensions)
AddNamespace(new RDFNamespace(RDFVocabulary.OG.PREFIX, RDFVocabulary.OG.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.OG.OG_MUSIC.PREFIX, RDFVocabulary.OG.OG_MUSIC.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.OG.OG_VIDEO.PREFIX, RDFVocabulary.OG.OG_VIDEO.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.OG.OG_ARTICLE.PREFIX, RDFVocabulary.OG.OG_ARTICLE.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.OG.OG_BOOK.PREFIX, RDFVocabulary.OG.OG_BOOK.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.OG.OG_PROFILE.PREFIX, RDFVocabulary.OG.OG_PROFILE.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.OG.OG_WEBSITE.PREFIX, RDFVocabulary.OG.OG_WEBSITE.BASE_URI));
#endregion
}
/// <summary>
/// Default-ctor to initialize the singleton instance of the register
/// </summary>
static RDFNamespaceRegister()
{
Instance = new RDFNamespaceRegister();
Instance.Register = new List <RDFNamespace>();
SetDefaultNamespace(new RDFNamespace("rdfsharp", "https://rdfsharp.codeplex.com/"));
#region Basic Namespaces
//xsd
AddNamespace(new RDFNamespace(RDFVocabulary.XSD.PREFIX, RDFVocabulary.XSD.BASE_URI));
//xml
AddNamespace(new RDFNamespace(RDFVocabulary.XML.PREFIX, RDFVocabulary.XML.BASE_URI));
//rdf
AddNamespace(new RDFNamespace(RDFVocabulary.RDF.PREFIX, RDFVocabulary.RDF.BASE_URI));
//rdfs
AddNamespace(new RDFNamespace(RDFVocabulary.RDFS.PREFIX, RDFVocabulary.RDFS.BASE_URI));
//owl
AddNamespace(new RDFNamespace(RDFVocabulary.OWL.PREFIX, RDFVocabulary.OWL.BASE_URI));
//sh
AddNamespace(new RDFNamespace(RDFVocabulary.SHACL.PREFIX, RDFVocabulary.SHACL.BASE_URI));
#endregion
#region Extended Namespaces
//dc
AddNamespace(new RDFNamespace(RDFVocabulary.DC.PREFIX, RDFVocabulary.DC.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.DC.DCAM.PREFIX, RDFVocabulary.DC.DCAM.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.DC.DCTERMS.PREFIX, RDFVocabulary.DC.DCTERMS.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.DC.DCTYPE.PREFIX, RDFVocabulary.DC.DCTYPE.BASE_URI));
//foaf
AddNamespace(new RDFNamespace(RDFVocabulary.FOAF.PREFIX, RDFVocabulary.FOAF.BASE_URI));
//earl
AddNamespace(new RDFNamespace(RDFVocabulary.EARL.PREFIX, RDFVocabulary.EARL.BASE_URI));
//geo
AddNamespace(new RDFNamespace(RDFVocabulary.GEO.PREFIX, RDFVocabulary.GEO.BASE_URI));
//sioc
AddNamespace(new RDFNamespace(RDFVocabulary.SIOC.PREFIX, RDFVocabulary.SIOC.BASE_URI));
//skos
AddNamespace(new RDFNamespace(RDFVocabulary.SKOS.PREFIX, RDFVocabulary.SKOS.BASE_URI));
AddNamespace(new RDFNamespace(RDFVocabulary.SKOS.SKOSXL.PREFIX, RDFVocabulary.SKOS.SKOSXL.BASE_URI));
#endregion
}
/// <summary>
/// Serializes the given graph to the given stream using XML data format.
/// </summary>
internal static void Serialize(RDFGraph graph, Stream outputStream)
{
try {
#region serialize
using (XmlTextWriter rdfxmlWriter = new XmlTextWriter(outputStream, Encoding.UTF8)) {
XmlDocument rdfDoc = new XmlDocument();
rdfxmlWriter.Formatting = Formatting.Indented;
#region xmlDecl
XmlDeclaration xmlDecl = rdfDoc.CreateXmlDeclaration("1.0", "UTF-8", null);
rdfDoc.AppendChild(xmlDecl);
#endregion
#region rdfRoot
XmlNode rdfRoot = rdfDoc.CreateNode(XmlNodeType.Element, RDFVocabulary.RDF.PREFIX + ":RDF", RDFVocabulary.RDF.BASE_URI);
XmlAttribute rdfRootNS = rdfDoc.CreateAttribute("xmlns:" + RDFVocabulary.RDF.PREFIX);
XmlText rdfRootNSText = rdfDoc.CreateTextNode(RDFVocabulary.RDF.BASE_URI);
rdfRootNS.AppendChild(rdfRootNSText);
rdfRoot.Attributes.Append(rdfRootNS);
#region prefixes
//Write the graph's prefixes (except for "rdf", which has already been written)
graph.GraphMetadata.Namespaces.ForEach(p => {
if (!p.Prefix.Equals(RDFVocabulary.RDF.PREFIX, StringComparison.Ordinal) && !p.Prefix.Equals("base", StringComparison.Ordinal))
{
XmlAttribute pfRootNS = rdfDoc.CreateAttribute("xmlns:" + p.Prefix);
XmlText pfRootNSText = rdfDoc.CreateTextNode(p.ToString());
pfRootNS.AppendChild(pfRootNSText);
rdfRoot.Attributes.Append(pfRootNS);
}
});
//Write the graph's base uri to resolve eventual relative #IDs
XmlAttribute pfBaseNS = rdfDoc.CreateAttribute(RDFVocabulary.XML.PREFIX + ":base");
XmlText pfBaseNSText = rdfDoc.CreateTextNode(graph.Context.ToString());
pfBaseNS.AppendChild(pfBaseNSText);
rdfRoot.Attributes.Append(pfBaseNS);
#endregion
#region linq
//Group the graph's triples by subj
var groupedList = (from triple in graph
orderby triple.Subject.ToString()
group triple by new {
subj = triple.Subject.ToString()
});
#endregion
#region graph
//Iterate over the calculated groups
Dictionary <RDFResource, XmlNode> containers = new Dictionary <RDFResource, XmlNode>();
//Floating containers have reification subject which is never object of any graph's triple
Boolean floatingContainers = graph.GraphMetadata.Containers.Keys.Any(k =>
graph.Triples.Values.Count(v => v.Object.Equals(k)) == 0);
//Floating collections have reification subject which is never object of any graph's triple
Boolean floatingCollections = graph.GraphMetadata.Collections.Keys.Any(k =>
graph.Triples.Values.Count(v => v.Object.Equals(k)) == 0);
foreach (var group in groupedList)
{
#region subj
//Check if the current subj is a container or a collection subj: if so it must be
//serialized in the canonical RDF/XML way instead of the "rdf:Description" way
XmlNode subjNode = null;
String subj = group.Key.subj;
//It is a container subj, so add it to the containers pool
if (graph.GraphMetadata.Containers.Keys.Any(k => k.ToString().Equals(subj, StringComparison.Ordinal)) && !floatingContainers)
{
switch (graph.GraphMetadata.Containers.Single(c => c.Key.ToString().Equals(subj, StringComparison.Ordinal)).Value)
{
case RDFModelEnums.RDFContainerType.Bag:
subjNode = rdfDoc.CreateNode(XmlNodeType.Element, RDFVocabulary.RDF.PREFIX + ":Bag", RDFVocabulary.RDF.BASE_URI);
containers.Add(new RDFResource(subj), subjNode);
break;
case RDFModelEnums.RDFContainerType.Seq:
subjNode = rdfDoc.CreateNode(XmlNodeType.Element, RDFVocabulary.RDF.PREFIX + ":Seq", RDFVocabulary.RDF.BASE_URI);
containers.Add(new RDFResource(subj), subjNode);
break;
case RDFModelEnums.RDFContainerType.Alt:
subjNode = rdfDoc.CreateNode(XmlNodeType.Element, RDFVocabulary.RDF.PREFIX + ":Alt", RDFVocabulary.RDF.BASE_URI);
containers.Add(new RDFResource(subj), subjNode);
break;
}
}
//It is a subj of a collection of resources, so do not append triples having it as a subject
//because we will reconstruct the collection and append it as a whole
else if (graph.GraphMetadata.Collections.Keys.Any(k => k.ToString().Equals(subj, StringComparison.Ordinal)) &&
graph.GraphMetadata.Collections.Single(c => c.Key.ToString().Equals(subj, StringComparison.Ordinal)).Value.ItemType == RDFModelEnums.RDFItemType.Resource &&
!floatingCollections)
{
continue;
}
//It is neither a container or a collection subj
else
{
subjNode = rdfDoc.CreateNode(XmlNodeType.Element, RDFVocabulary.RDF.PREFIX + ":Description", RDFVocabulary.RDF.BASE_URI);
//<rdf:Description rdf:nodeID="blankID">
XmlAttribute subjNodeDesc = null;
XmlText subjNodeDescText = rdfDoc.CreateTextNode(group.Key.subj);
if (group.Key.subj.StartsWith("bnode:"))
{
subjNodeDescText.InnerText = subjNodeDescText.InnerText.Replace("bnode:", String.Empty);
subjNodeDesc = rdfDoc.CreateAttribute(RDFVocabulary.RDF.PREFIX + ":nodeID", RDFVocabulary.RDF.BASE_URI);
}
//<rdf:Description rdf:about="subjURI">
else
{
subjNodeDesc = rdfDoc.CreateAttribute(RDFVocabulary.RDF.PREFIX + ":about", RDFVocabulary.RDF.BASE_URI);
}
subjNodeDesc.AppendChild(subjNodeDescText);
subjNode.Attributes.Append(subjNodeDesc);
}
#endregion
#region predObjList
//Iterate over the triples of the current group
foreach (var triple in group)
{
//Do not append the triple if it is "SUBJECT rdf:type rdf:[Bag|Seq|Alt]"
if (!(triple.Predicate.Equals(RDFVocabulary.RDF.TYPE) &&
(subjNode.Name.Equals(RDFVocabulary.RDF.PREFIX + ":Bag", StringComparison.Ordinal) ||
subjNode.Name.Equals(RDFVocabulary.RDF.PREFIX + ":Seq", StringComparison.Ordinal) ||
subjNode.Name.Equals(RDFVocabulary.RDF.PREFIX + ":Alt", StringComparison.Ordinal))))
{
#region pred
String predString = triple.Predicate.ToString();
//"<predPREF:predURI"
RDFNamespace predNS =
(RDFNamespaceRegister.GetByNamespace(predString) ??
RDFModelUtilities.GenerateNamespace(predString, false));
//Refine the pred with eventually necessary sanitizations
String predUri = predString.Replace(predNS.ToString(), predNS.Prefix + ":")
.Replace(":#", ":")
.TrimEnd(new Char[] { ':', '/' });
//Sanitize eventually detected automatic namespace
if (predUri.StartsWith("autoNS:"))
{
predUri = predUri.Replace("autoNS:", string.Empty);
}
//Do not write "xmlns" attribute if the predUri is the context of the graph
XmlNode predNode = null;
if (predNS.ToString().Equals(graph.Context.ToString(), StringComparison.Ordinal))
{
predNode = rdfDoc.CreateNode(XmlNodeType.Element, predUri, null);
}
else
{
predNode = rdfDoc.CreateNode(XmlNodeType.Element, predUri, predNS.ToString());
}
#endregion
#region object
if (triple.TripleFlavor == RDFModelEnums.RDFTripleFlavor.SPO)
{
//If the object is a container subj, we must append its entire node saved in the containers dictionary
if (containers.Keys.Any(k => k.Equals(triple.Object)) && !floatingContainers)
{
predNode.AppendChild(containers.Single(c => c.Key.Equals(triple.Object)).Value);
}
//Else, if the object is a subject of a collection of resources, we must append the "rdf:parseType=Collection" attribute to the predicate node
else if (graph.GraphMetadata.Collections.Keys.Any(k => k.Equals(triple.Object)) &&
graph.GraphMetadata.Collections.Single(c => c.Key.Equals(triple.Object)).Value.ItemType == RDFModelEnums.RDFItemType.Resource &&
!floatingCollections)
{
XmlAttribute rdfParseType = rdfDoc.CreateAttribute(RDFVocabulary.RDF.PREFIX + ":parseType", RDFVocabulary.RDF.BASE_URI);
XmlText rdfParseTypeText = rdfDoc.CreateTextNode("Collection");
rdfParseType.AppendChild(rdfParseTypeText);
predNode.Attributes.Append(rdfParseType);
//Then we append sequentially the collection elements
List <XmlNode> collElements = ReconstructCollection(graph.GraphMetadata, (RDFResource)triple.Object, rdfDoc);
collElements.ForEach(c => predNode.AppendChild(c));
}
//Else, threat it as a traditional object node
else
{
String objString = triple.Object.ToString();
XmlAttribute predNodeDesc = null;
XmlText predNodeDescText = rdfDoc.CreateTextNode(objString);
// rdf:nodeID="blankID">
if (objString.StartsWith("bnode:"))
{
predNodeDescText.InnerText = predNodeDescText.InnerText.Replace("bnode:", String.Empty);
predNodeDesc = rdfDoc.CreateAttribute(RDFVocabulary.RDF.PREFIX + ":nodeID", RDFVocabulary.RDF.BASE_URI);
}
// rdf:resource="objURI">
else
{
predNodeDesc = rdfDoc.CreateAttribute(RDFVocabulary.RDF.PREFIX + ":resource", RDFVocabulary.RDF.BASE_URI);
}
predNodeDesc.AppendChild(predNodeDescText);
predNode.Attributes.Append(predNodeDesc);
}
}
#endregion
#region literal
else
{
#region plain literal
if (triple.Object is RDFPlainLiteral)
{
RDFPlainLiteral pLit = (RDFPlainLiteral)triple.Object;
// xml:lang="plitLANG">
if (pLit.Language != String.Empty)
{
XmlAttribute plainLiteralLangNodeDesc = rdfDoc.CreateAttribute(RDFVocabulary.XML.PREFIX + ":lang", RDFVocabulary.XML.BASE_URI);
XmlText plainLiteralLangNodeDescText = rdfDoc.CreateTextNode(pLit.Language);
plainLiteralLangNodeDesc.AppendChild(plainLiteralLangNodeDescText);
predNode.Attributes.Append(plainLiteralLangNodeDesc);
}
}
#endregion
#region typed literal
// rdf:datatype="tlitURI">
else
{
RDFTypedLiteral tLit = (RDFTypedLiteral)triple.Object;
XmlAttribute typedLiteralNodeDesc = rdfDoc.CreateAttribute(RDFVocabulary.RDF.PREFIX + ":datatype", RDFVocabulary.RDF.BASE_URI);
XmlText typedLiteralNodeDescText = rdfDoc.CreateTextNode(RDFModelUtilities.GetDatatypeFromEnum(tLit.Datatype));
typedLiteralNodeDesc.AppendChild(typedLiteralNodeDescText);
predNode.Attributes.Append(typedLiteralNodeDesc);
}
#endregion
//litVALUE</predPREF:predURI>"
XmlText litNodeDescText = rdfDoc.CreateTextNode(((RDFLiteral)triple.Object).Value);
predNode.AppendChild(litNodeDescText);
}
#endregion
subjNode.AppendChild(predNode);
}
}
//Raw containers must not be written as-is, instead they have to be saved
//and attached when their subj is found later as object of a triple
if (!subjNode.Name.Equals(RDFVocabulary.RDF.PREFIX + ":Bag", StringComparison.Ordinal) &&
!subjNode.Name.Equals(RDFVocabulary.RDF.PREFIX + ":Seq", StringComparison.Ordinal) &&
!subjNode.Name.Equals(RDFVocabulary.RDF.PREFIX + ":Alt", StringComparison.Ordinal))
{
rdfRoot.AppendChild(subjNode);
}
#endregion
}
#endregion
rdfDoc.AppendChild(rdfRoot);
#endregion
rdfDoc.Save(rdfxmlWriter);
}
#endregion
}
catch (Exception ex) {
throw new RDFModelException("Cannot serialize Xml because: " + ex.Message, ex);
}
}