gstreamer/docs/plugins/inspect/plugin-alsa.xml

<plugin>
  <name>alsa</name>
  <description>ALSA plugin library</description>
  <filename>../../ext/alsa/.libs/libgstalsa.so</filename>
  <basename>libgstalsa.so</basename>
  <version>0.10.9</version>
  <license>LGPL</license>
  <source>gst-plugins-base</source>
  <package>GStreamer Base Plug-ins source release</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>alsamixer</name>
      <longname>Alsa mixer</longname>
      <class>Generic/Audio</class>
      <description>Control sound input and output levels with ALSA</description>
      <author>Leif Johnson &lt;leif@ambient.2y.net&gt;</author>
    </element>
    <element>
      <name>alsasink</name>
      <longname>Audio sink (ALSA)</longname>
      <class>Sink/Audio</class>
      <description>Output to a sound card via ALSA</description>
      <author>Wim Taymans &lt;wim@fluendo.com&gt;</author>
    </element>
    <element>
      <name>alsasrc</name>
      <longname>Audio source (ALSA)</longname>
      <class>Source/Audio</class>
      <description>Read from a sound card via ALSA</description>
      <author>Wim Taymans &lt;wim@fluendo.com&gt;</author>
    </element>
  </elements>
</plugin>