public TsOpcElement(TsOpcTagsStructure owner, 
			TsCDaBrowseElement element)
		{
			if (owner == null)
			{
				throw new ArgumentNullException("owner");
			}
			if (element == null)
			{
				throw new ArgumentNullException("element");
			}
			_owner = owner;
			_element = element;
		}
		void OnGetTagsAndGroups()
		{
			var elements = Browse();
			TagsAndGroups = new TsOpcTagsStructure(elements);
		}