InformationWeek

May 22, 2000

XML Server Pages Vs. Java Server Pages

ocoon's XML Server Pages can keep program logic separate from output format.

Java Server Page (JSP)
Output format, specified by the out.println statements below, are mixed with program logic

<jsp:scriplet>
�..
</jsp:scriplet>
<list>
<title>Servlet Parameters</title>
<jsp:scriplet>
�..
request.getParameterValues(k);
out.println("<element name=\"name\">");
</jsp:scriplet>
<jsp:expression>k</jsp:expression>
<jsp:scriplet>
out.println("</element>");
for(int i = 0; i < vals.length; i++) {
</jsp:scriplet>
<item> <jsp:expression>vals[i]</jsp:
expression>
</item>
��
</jsp:scriplet>

DATA: APACHE SOFTWARE FOUNDATION

XML Server Page (XSP)
The division between content and logic is clear in the code fragment below. A separate XSL style sheet is used to format the output

<xsp:logic>
�..
<xsl:content>
<list>
<title>Servlet Parameters</title>
<xsp:logic>
�..
request.getParameterValues(k);
<xsp:element name="element">
<xsp:attribute name="name">
<xsp:expr>k</xsp:expr>
</xsp:attribute>
<xsp:logic>
for(int i = 0; i < vals.length; i++) {
<item>
<xsp:expr>vals[i]</xsp:expr>
</item>
��
</xsp:logic>