simple path query

基本解释

That simple step could lead to a new access path that might dramatically improve query performance.
這個簡單的步驟可能産生新的訪問路逕，可能顯著改進查詢性能。
XML query includes content query and structural query. The query condition can be represented as a simple path expression (SPE) or a regular path expression (RPE).
XML查詢包含內容查詢和結搆查詢，其查詢條件可表示爲簡單路逕表達式（SPE）和正則路逕路逕表達式（RPE）。
At first, an algorithm is proposed, which rewrites a regular path expression based XML query as a group of simple path expression based queries using mapping information(mapping graph).
首先提出了一個利用映射信息（映射圖）將帶正則路逕表達式的XML 查詢重寫爲一組簡單路逕查詢的算法。