Warning on sip.xml in Eclipse

Question

I have a sip.xml (for SIP servlets)

<?xml version="1.0" encoding="UTF-8"?>

<sip-app>
...
</sip-app>

and I get the Eclipse warning No grammar constraints (DTD or XML Schema) referenced in the document.

How can I fix it? `

Answer 1

I modified <sip-app> to <sip-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.jcp.org/xml/ns/sipservlet" xsi:schemaLocation="http://www.jcp.org/xml/ns/sipservlet http://www.jcp.org/xml/ns/sipservlet/sip-app_1_1.xsd">. Problem solved!