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> ## JavaServer Pages Standard Tag Library

> ##### Stephanie Bodoff

> The JavaServer Pages Standard Tag Library (JSTL) encapsulates core functionality common to many JSP applications. For example, instead of iterating over lists using a scriptlet or different iteration tags from numerous vendors, JSTL defines a standard set of tags. This standardization allows you to learn a single set of tags and use them on multiple JSP containers. Also, a standard tag library is more likely to have an optimized implementation.

> JSTL has support for common, structural tasks such as iteration and conditionals, tags for manipulating XML documents, internationalization tags, and tags for accessing databases using SQL.

> This chapter demonstrates JSTL through excerpts from the JSP version of the Duke's Bookstore application discussed in the previous chapter. It assumes that you are familiar with the material in the Using Custom Tags section of Chapter 16.

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