Based on the JSTL functions, they are categorized into five types :
Core Tags : Core tags provide support for iteration, conditional logic, catch exception, url, forward or redirect response etc.
Formatting and Localization Tags : These tags are provided for formatting of Numbers, Dates and i18n support through locales and resource bundles.
SQL Tags : JSTL SQL Tags provide support for interaction with relational databases such as Oracle, MySql etc.
XML Tags : XML tags are used to work with XML documents such as parsing XML, transforming XML data and XPath expressions evaluation.
JSTL Functions Tags : JSTL tags provide a number of functions that we can use to perform common operation, most of them are for String manipulation such as String Concatenation, Split String etc.
