该公司希望它的XML是可扩展的，这样的话，无需大量重新编写模式即可方便地添加新的产品。

The company wants its XML to be extensible so that new products can be added neatly without extensive rewriting of the schemas.

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另外，不佳的可维护性还会让开发人员十分头痛(进而导致开发人员的缺乏)——代码越容易修改，就越容易添加新的产品特性。

Furthermore, maintainability contributes to the frustration (or lack thereof) of developers — the easier it is to make code changes, the easier it is to add new product features.

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当新的内容和产品信息添加到站点时，站点地图会帮助搜索引擎快速建立这些新内容的索引。

As new content and product information are added to the site, the site map helps the search engine to index this new content quickly.

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