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

<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

<!-- This component and the accompanying materials are made available under the terms of the License 

"Eclipse Public License v1.0" which accompanies this distribution, 

and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

<!-- Initial Contributors:

    Nokia Corporation - initial contribution.

Contributors: 

-->

<!DOCTYPE concept

  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

<concept id="GUID-625FFD05-5660-4A8B-A543-BABB5E7A5503" xml:lang="en"><title>Header

Structure</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<section id="GUID-5C773AFB-8332-4CB2-B811-E8029F79E284"> <p>HTTP represents

headers as a composition of parts and parameters. A simple header will have

only one part, for example: </p> <codeblock id="GUID-A82B0317-1A26-5903-8E71-00144572B193" xml:space="preserve">Location: www.symbian.org</codeblock> <p>More

complex headers consist of a number of parts, separated by semicolon (;) or

comma (,) characters. In RFC 2616, these are defined with the EBNF notation

'rule - A construct "#" is defined, similar to "*", for defining lists of

elements...' </p> <p>An example of a multiple-part header is: </p> <codeblock id="GUID-5A84BC7B-DDB4-59C2-9A94-6AB27B16E15A" xml:space="preserve">Accept: text/*, text/html, */*</codeblock> <p>The

three parts have values text/*, text/html and */* respectively. When setting

up a header like this, the client only needs to specify the parts, and need

not be concerned with separator characters. Separators are handled automatically

by the built-in header codec. </p> <p>Some header fields allow one or more

parameters to be associated with individual header parts. An example of a

header with parameters is: </p> <codeblock id="GUID-74FC7FC7-EC3A-55EF-840F-8952E13B1A80" xml:space="preserve">Content-Type: text/html; charset=ISO-8859-4</codeblock> <p>The Content-Type header has a single part (value 'text/html') that has a

single parameter (named 'charset', value 'ISO-8859-4'). Again, the client

need only be concerned with setting part and parameter values; the separators

including the '=' character are dealt with automatically. </p> </section>

</conbody></concept>