For example, the user may be looking for a website (navigational query) to buy something (transactional query) or to learn something (informational query).
例如，用户可能需要寻找一个网站(业务查询)买东西(交易查询)或了解某事(信息查询)。
It enables the programmer to easily query and modify navigational state information.
它允许程序员方便地查询和修改导航状态信息。
Programmers can now search for data using SQL or XQuery, a new query language that supports navigational (or path-based) expressions.
程序员现在可以使用 SQL 或 XQuery 搜索数据，XQuery 是一种新的查询语言，支持导航（即基于路径的）表达式。
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