SECTION 子句作为文本搜索条件的一部分，标识出应该在 XML 文档结构的哪个部分中进行文本搜索。
The SECTION clause as part of the text search criteria identifies the part within the XML document structure where text search shall occur.
这些标识符可用于完整地描述产品，并且通常用做查找产品的重要搜索条件。
These are used for more fully describing the product and are often important search criteria for finding products.
如果使用表，条件可以跨任意数量的行，只要字段名称等标识符不跨行即可。
If a table is used, the condition can span an arbitrary number of lines as long as identifiers, such as field names, are not word-wrapped.
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