初级的方法是使用一个游标对表进行扫描，并为每一行执行一个定位的更新语句。

The naive approach USES a cursor to scan the table and execute a positioned update statement for each row.

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如果没有启用MRF，准备fetch语句时将不包含行集定位。

If MRF is not enabled, FETCH statements are prepared without rowset positioning.

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清单5中首先展示常规的XML声明，然后是一个定位DTD的doctype语句，在本例中是指向与文法相关的详细信息。

Listing 5 shows the customary XML declaration, followed by a DOCTYPE statement that locates the DTD, in this case pointing at detail related to grammars.

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