final FeatureSource<FeatureType, Feature> fSource = (FeatureSource<FeatureType, Feature>) mappingDataStore
.getFeatureSource(typeName);
final String queryProperty = "sa:shape/geo:LineByVector/geo:origin/@xlink:href";
final String queryLiteral = "#bh.176909a.start";
NamespaceSupport namespaces = new NamespaceSupport();
namespaces.declarePrefix("sa", SANS);
namespaces.declarePrefix("geo", GEONS);
namespaces.declarePrefix("xlink", XLINK.NAMESPACE);
FeatureCollection<FeatureType, Feature> features = (FeatureCollection) fSource
.getFeatures();
Feature f = (Feature) features.features().next();
traverse(f);