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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<concept id="GUID-9D6E0EB4-CBF8-48BC-A76F-FE6366D4D96E" xml:lang="en"><title>Downloading</title><prolog><metadata><keywords/></metadata></prolog><conbody>
<p>You can use the Download Manager Client API to create and manage a session
in which files are downloaded over HTTP or HTTPS. </p>
<p>The DRM APIs provided by the multimedia framework on the Symbian platform
allow you to provide DRM services in your application.</p>
<section id="GUID-541D396A-FAD1-4B8B-A4AB-09758369293B"><title>OMA download</title>
<p>The Symbian platform supports the <xref href="http://www.openmobilealliance.org/" scope="external">Open
Mobile Alliance</xref> (OMA) download v1.0 open standard and application-level
protocol that enables reliable content downloads. It can be integrated with
other services, such as billing, allowing premium-priced content to be made
available to mobile users. OMA download replaces content object descriptor
(COD) download as the preferred method for downloading content to mobile devices.</p>
<p>OMA download improves the mobile device user experience by informing
users of the success of the content download. This helps ensure that the content
can be used in the mobile device and that users are not charged if downloading
fails. OMA download is used on top of HTTP or the wireless session protocol
(WSP). </p>
<p>The effort needed to implement OMA download is minimal. An operator
only needs to create a so-called download descriptor file for each piece of
content and make simple changes in the HTTP server to enable the OMA download
protocol. For example, OMA download can be adopted without any changes in
the billing mechanisms. However, to fully benefit from it, some changes are
required in order to know whether users received the ordered content and hence
ensure that they will not be charged if downloading fails. The install notification
feature of OMA download can, for example, be used as an event that triggers
billing.</p>

</section>
<section id="GUID-5968A533-AC94-4DC6-B0B3-4F9A0D149F88"><title>Additional information</title>
<p>For general information on DRM and reliable download technologies, see
the <xref href="http://www.forum.nokia.com/main/resources/technologies/drm_and_download/index.html" scope="external">DRM
and Download page</xref>. It includes links to information on Open Mobile
Alliance (OMA) DRM and OMA download standards as well as a useful table on
DRM support in different releases of the Symbian platform.</p>
<p>For additional information on DRM, see the <xref href="http://www.forum.nokia.com/main/resources/documentation/drm.html" scope="external">DRM
documentation page </xref>.</p>
<p>For more information on multimedia and the multimedia
framework, see <xref href="GUID-1DE5CDAD-8D71-5384-9E98-5665D5A4C792.dita">Multimedia
Guide</xref>.</p>
</section>
</conbody></concept>