/// <summary> /// Tweak old XMP: Move an instance ID from rdf:about to the /// <em>xmpMM:InstanceID</em> property. An old instance ID usually looks /// like "uuid:bac965c4-9d87-11d9-9a30-000d936b79c4", plus InDesign /// 3.0 wrote them like "bac965c4-9d87-11d9-9a30-000d936b79c4". If /// the name looks like a UUID simply move it to <em>xmpMM:InstanceID</em>, /// don't worry about any existing <em>xmpMM:InstanceID</em>. Both will /// only be present when a newer file with the <em>xmpMM:InstanceID</em> /// property is updated by an old app that uses <em>rdf:about</em>. /// </summary> /// <param name="tree"> the root of the metadata tree </param> /// <exception cref="XmpException"> Thrown if tweaking fails. </exception> private static void TweakOldXmp(XmpNode tree) { if (tree.Name != null && tree.Name.Length >= Utils.UUID_LENGTH) { string nameStr = tree.Name.ToLower(); if (nameStr.StartsWith("uuid:")) { nameStr = nameStr.Substring(5); } if (Utils.CheckUuidFormat(nameStr)) { // move UUID to xmpMM:InstanceID and remove it from the root node XmpPath path = XmpPathParser.ExpandXPath(XmpConst.NS_XMP_MM, "InstanceID"); XmpNode idNode = XmpNodeUtils.FindNode(tree, path, true, null); if (idNode != null) { idNode.Options = null; // Clobber any existing xmpMM:InstanceID. idNode.Value = "uuid:" + nameStr; idNode.RemoveChildren(); idNode.RemoveQualifiers(); tree.Name = null; } else { throw new XmpException("Failure creating xmpMM:InstanceID", XmpError.INTERNALFAILURE); } } } }