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The role attribute specifies the purpose or type of a
media element. This attribute enables you to create custom
categories for digital media sources, such as music,
bumper, promo, or public service
announcement. The WMS Client Logging plug-in uses the value
specified in the role attribute to populate the
cs-media-role field.
You can use any naming scheme to set values for the role
attribute. However, the value Advertisement has a
special meaning. Whenever the server starts to stream a
media element with the role attribute value of
Advertisement, the Advertisement counter is
incremented on the Monitor tab. Advertisements streamed by
wrapper playlists increment the counters in the same manner.
In the following example, the first entry is logged with a
role attribute value of music segment, and the
second with the role attribute value of
Advertisement. The second entry also includes a
noSkip attribute set to true in order to
prevent the user from skipping the advertisement.
<?wsx version='1.0'?>
<smil>
<media src="MusicVideo.wmv" role="music segment"/>
<media src="Comml1.wmv" role="Advertisement" noSkip="true"/>
</smil>
The primary purpose of the role attribute is to help you
analyze and understand logging data. If you use a database to track
logging data, you can create reports that separate content usage by
type; for example, you can create a report showing the different
types of music files played, a chart showing the types of content
that users preferred, or the number of public service announcements
that you played. For example, you can set the value of the
role attribute to movie and then interpret the
log file to determine how many times movies have been streamed.
Keep in mind that if the media element references another
playlist, rather than a specific item, the advertisement counters
are not updated.
The role attribute can be specified for the following playlist element:
Notes