Except for keyword - in - contextindex, there is no breakthrough made in automatic derived indexing today due to low precision ratio of retrieval.
自动抽词标引除编制题内关键词索引外，至今没有突破性进展，主要是检准率太低。
2
In the context of the DB2 text Search index processing, for each row, the content of each column is treated as a document.
在DB 2文本搜索索引处理上下文中，对于每一行记录，其中的每一个字段都会被作为一个文档进行处理。
3
An index entry is created for each complete tag context for each data element — that is, the concatenation of every tag leading up to the data element.