Further , compression might be employed. these operations are called text operations (or transformations) and are covered in detail in chapter 7. Text operations reduce the complexity of the document representation and allow moving the logical view from that of a full text to that of a set of index terms.
參考答案:进一步， 压缩也许被使用。 这些操作在第7章称文本操作(或变革)和详细包括。 文本操作减少本文表示法的复杂并且准许移动逻辑看法从那全文本向那一套索引期限。
