The ideal situation for base table row storage of XML data is when the table has only one column of XML type and the maximum size of the XML document doesn't exceed the page size.

The new document, which updates joint air operations doctrine published in 2003, says that when data links fail in combat it can be tough to get a UAV back to its base.

The key of solving these problems included two aspects, forming public classical document data base and developing document retrieval service system.