Why am I getting h:outputLabel as an unknown tag?

Question

I'm trying to learn JSF for a project I have in my internship, and I'm really struggling.

Can anyone explain why in this piece of code I am getting an "Unknown tag" warning for h:outputLabel?

Thank you!

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0      Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Insert title here</title>
</head>
<body>

    <h:outputLabel value ="Welcome #{loginbean.name}"></h:outputLabel>

</body>
</html>

score 7 · Accepted Answer · edited May 23 '17 at 11:44

7

Because you forgot to declare the h: XML namespace.

Add that XML namespace to your <html> element.

<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://java.sun.com/jsf/html">

Can you explain, why it´s better to use it in template text, without the h:outputText? Does it really save time, because it´s not in the jsf-tree? – marcel Oct 21 '15 at 07:47
1

@marcel: it will end up in tree, but with less overhead and better maintainability. – BalusC Oct 21 '15 at 07:49
That was fast! Thank-you :) – marcel Oct 21 '15 at 07:51

Why am I getting h:outputLabel as an unknown tag?

1 Answers1

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