Jsf library with web.xml

Jsf library (that is included in开发者_运维知识库 WEB-INF/lib) might contain its own faces-config.xml file.

Is it possible for such a library to include also its own web.xml file?

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Not until Servlet 3.0.

There you'll have "web fragments" (see under "Pluggability and Extensibility" from the above article)