Sanjay Singh. Oracle PL/SQL Web Toolkit Reference

The packages in the the PL/SQL Web Toolkit are described in the following chapters:describes the htp and htf packages which generate HTML tags.
describes the owa_cache package which contains functions and procedures that enable the PL/SQL Gateway cache.
describes the owa_cookie package which contains subprograms that send and retrieve HTTP cookies from the client’s browser.
describes the owa_image package which is used when you have any image map whose destination links invoke the PL/SQL Gateway.
describes the owa_lock package which contains subprograms that are used to implement database locking for PL/SQL Gateway.
describes the owa_pattern package which locates text patterns within strings and replaces the matched string with another string.
describes the owa_sec package which contains functions, procedures, and data types to implement security.
describes the owa_text package which contains subprograms used by owa_pattern for manipulating strings.
describes the owa_util package which contains utility subprograms.