The notes on using JSP documents are as follows:

• In a JSP document, specify a valid value in the xmlns:jsp attribute of the jsp:root tag as described in the JSP 1.2 specifications. If you specify an invalid value outside the scope described in the JSP 1.2 specifications, that value is ignored.
• You must specify 1.2 in the version attribute of the jsp:root tag in the JSP document.
• In a JSP document, you must specify only the valid values for tag attributes as described in the JSP 1.2 specifications. Any invalid value specified in tag attributes is ignored.
• In a JSP document, you must specify all the tag attributes that are specified as mandatory in the JSP 1.2 specifications. If you omit any of the mandatory attributes, the operation is not guaranteed.
• In JSP documents, you must not code the tags as child tags if they are not allowed to be described as child tags. If you inappropriately code tags as child tags, operation is not guaranteed.
• A JSP document with the UTF-8 character code cannot be used if BOM is added to the document. If you want to use the UTF-8 character code for a JSP document, you must not add the BOM. A JSP document with the UTF-8 character code and BOM added to it results in a compilation error.

You need to only code the correct value for the pageEncoding attribute in the page directive of a JSP page or <jsp:directive.page> tag of a JSP document once

However, no error occurs even if you code the pageEncoding attribute in the page directive of a JSP page or jsp:directive.page tag of a JSP document more than once.

You cannot code a tag that starts with "jsp:" and that is not a tag included in the JSP 1.2 specifications.

You must not define duplicate attributes in a tag. The operation is not guaranteed if you define duplicate attributes within a tag in a JSP page.

If you specify webserver.xml.validate=false for a property, the tag library descriptor (TLD file) is not validated. Although no error might be output and the operation is continued even if you use a TLD file that does not comply with the specifications (XML schema definitions), the operation is not guaranteed.

You must properly follow the specifications (XML schema definitions) when coding the TLD file.

You must specify only a value specified in the JSP 1.2 specifications for a plugin action in a JSP page, or for the type attribute of the jsp:plugin tag of a JSP document. If you specify a value that is not specified in the JSP 1.2 specifications, the output value of the type attribute will be NULL.

As coding the jsp:param tag is mandatory according to the specifications, if you code the params action or the jsp:params tag, you must also code the jsp:param tag.

However, if you code the params action in the JSP page of a JSP document, or if you code the jsp:params tag in a JSP document, no error occurs even if you do not code the jsp:param tag element.