/** Converts an ordinal property to an integer. */
public static int getOrd(Resource r) throws ModelException {
if (r == null) return -1;
String uri = r.toString();
if (!isRDF(uri)) return -1;
int pos = getNamespaceEnd(uri);
if (pos > 0 && pos + 1 < uri.length()) {
try {
int n = Integer.parseInt(uri.substring(pos + 1));
if (n >= 1) return n;
} catch (Exception any) {
}
}
return -1;
}
