设计了一种XML索引表数据结构，使得检索空间大幅缩减。

And a data structure of XML index table was designed to reduce the search space greatly.

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如果您有一个检索空间，它的时间，让您的工作服，并在那里获得。

If you have a crawl space, it's time to get your coveralls on and get in there.

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其中一个框架用于指定多个 SQL 查询，每个查询定义一个层，并从 DB2 数据库中检索空间和非空间数据。

One frame is used to specify multiple SQL queries, where each query defines a single layer and the spatial and non-spatial data is retrieved from your DB2 database.

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