In custom tags, the <body-content> is mandatory.It takes one value from the following values: empty,scriptless,tagdependent or JSP.
<body-content>empty</body-content> means the tag must not have any body
<body-content>scriptless</body-content> means the tag must not have scripting elements
<body-content>tagdependent</body-content>means the tag body is treated as plain text
<body-content>JSP</body-content>means the tag body can have anything that can go inside a jsp
