Searching within elements of a hierarchically structured database. Each element may include one or more hierarchically structured nodes for defining attributes of the element. One or more nodes of the searched element may fulfill one or more search conditions (c0,ci, . . ).;A plurality of codes may be searched and a unique identifier (EID) may be assigned to each of the selected nodes.;A reference index may be created that allows to derive for each unique identifier (EID) of a selected node the corresponding element of the database.;A set (L, Ei) of unique identifiers may be retrieved for each of the one or more search conditions for ancestor nodes, which fulfill the respective search condition.;A final set of unique identifiers may be obtained.;The searched elements of the database may be retrieved based on the final set of unique identifiers and the reference index.
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机译：在层次结构化数据库的元素内搜索。每个元素可以包括一个或多个用于定义元素属性的分层结构的节点。被搜索元素的一个或多个节点可以满足一个或多个搜索条件（c 0 ，c i ，...）。;可以搜索多个代码，并且唯一标识符（EID）可以分配给每个选定节点。可以创建参考索引，该索引允许为选定节点的每个唯一标识符（EID）导出数据库的相应元素。可以针对满足各自搜索条件的祖先节点的一个或多个搜索条件中的每一个，检索唯一标识符的E i ）;可以获取最终的唯一标识符集。可以基于唯一标识符的最终集合和参考索引来检索数据库的元素。
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