| 摘要 |
Textual elements and unambiguous locations paths corresponding to textual elements and/or their ancestors are extracted from a tree-structured document such as an XML document and stored in relational database structures. Textual elements are stored in a table comprising a column of textual elements and an identity column. The unambiguous location paths are stored in a second table in rows comprising the location path, the identity form the first table corresponding to the first textual element that is a descendant of the location path, the identity from the first table corresponding to the last textual element that is a descendant of the location path, and the name of the element located by the location path.
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