Abstract: Focused on the problems of object migration for object-oriented XML data，two approaches based on distributed and centralized storage model are put forward，each of which resolves the OID ambiguity problem.The second approach supports a single OID for a migrating object，and the updating of existing references can be expensive.The first approach supports multiple OIDs for an object as it migrates from one class to another along ISA hierarchy，and has relatively less overheads.

摘要： 针对面向对象的XML数据的对象迁移问题，提出基于集中式和分布式两种存储模式下的对象迁移方法，解决了对象标识符模糊性问题。集中式存储模式对象的OID是唯一的，但是在集中式存储模式中更新已存在的对迁移对象的引用代价很大；分布式存储模式对象的OID是多重的，但对象迁移的代价相对较小。