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     9 -->  <!DOCTYPE concept 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></keywords></metadata></prolog><conbody>

    10 <p>You can use the Download Manager Client

    11 API to create and manage a session in which files are downloaded

    12 over HTTP or HTTPS. </p>

    13 <p>The DRM

    14 APIs provided by the multimedia framework in the Symbian platform

    15 allow you to provide DRM services in your application.</p>

    16 <section id="GUID-541D396A-FAD1-4B8B-A4AB-09758369293B"><title>OMA download</title>

    17 <p>The Symbian platform supports the <xref scope="external" href="http://www.openmobilealliance.org/">Open

    18 Mobile Alliance</xref> (OMA) download v1.0 open standard and application-level

    19 protocol that enables reliable content downloads. It can be integrated with

    20 other services, such as billing, allowing premium-priced content to be made

    21 available to mobile users. OMA download replaces content object descriptor

    22 (COD) download as the preferred method for downloading content to mobile devices.</p>

    23 <p>OMA download improves the mobile device user experience by informing

    24 users of the success of the content download. This helps ensure that the content

    25 can be used in the mobile device and that users are not charged if downloading

    26 fails. OMA download is used on top of HTTP or the wireless session protocol

    27 (WSP). </p>

    28 <p>The effort needed to implement OMA download is minimal. An operator

    29 only needs to create a so-called download descriptor file for each piece of

    30 content and make simple changes in the HTTP server to enable the OMA download

    31 protocol. For example, OMA download can be adopted without any changes in

    32 the billing mechanisms. However, to fully benefit from it, some changes are

    33 required in order to know whether users received the ordered content and hence

    34 ensure that they will not be charged if downloading fails. The install notification

    35 feature of OMA download can, for example, be used as an event that triggers

    36 billing.</p>

    37 <p>OMA DRM and OMA download are independent technologies for independent

    38 tasks. Both promote the mobile content downloading business as well as improve

    39 the mobile device user experience of mobile content. Content protected by

    40 OMA DRM can be delivered using OMA download as well as multimedia messaging

    41 service (MMS), mobile information device profile (MIDP) OTA, and so on. OMA

    42 DRM and OMA download are standardized in parallel by OMA. For more information,

    43 see <xref href="GUID-60F25F66-8CC5-46BF-9274-BDE8F9A10B74.dita">OMA

    44 DRM v1.0</xref>.</p>

    45 </section>

    46 <section id="GUID-5968A533-AC94-4DC6-B0B3-4F9A0D149F88"><title>Additional information</title>

    47 <p>For general information on DRM and reliable download technologies, see

    48 the <xref scope="external" href="http://www.forum.nokia.com/main/resources/technologies/drm_and_download/index.html">DRM

    49 and Download page</xref>. It includes links to information on Open Mobile

    50 Alliance (OMA) DRM and OMA download standards as well as a useful table on

    51 DRM support in different releases of the Symbian platform.</p>

    52 <p>For additional information on DRM, see the <xref scope="external" href="http://www.forum.nokia.com/main/resources/documentation/drm.html">DRM

    53 documentation page </xref>.</p>

    54 <p>Forum Nokia also provides documentation on using downloading and DRM

    55 features in <xref scope="external" href="http://www.forum.nokia.com/main/resources/technologies/symbian/documentation/browsing___drm___download.html">applications

    56 written in Symbian C++</xref>.</p>

    57 <p>For more information on multimedia and the multimedia framework, see <xref href="GUID-C5738F3D-E1D5-492D-89C9-5AC28F22BE71.dita"></xref>.</p>

    58 </section>

    59 </conbody></concept>