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

<plugin>
  <name>proxy</name>
  <description>plugin for proxied inter-pipeline communication</description>
  <filename>../../gst/proxy/.libs/libgstproxy.so</filename>
  <basename>libgstproxy.so</basename>
  <version>1.15.2</version>
  <license>LGPL</license>
  <source>gst-plugins-bad</source>
  <package>GStreamer Bad Plug-ins</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>proxysink</name>
      <longname>Proxy Sink</longname>
      <class>Sink</class>
      <description>Proxy source for internal process communication</description>
      <author>Sebastian Dröge &lt;sebastian@centricular.com&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>ANY</details>
        </caps>
      </pads>
    </element>
    <element>
      <name>proxysrc</name>
      <longname>Proxy source</longname>
      <class>Source</class>
      <description>Proxy source for internal process communication</description>
      <author>Sebastian Dröge &lt;sebastian@centricular.com&gt;</author>
      <pads>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>ANY</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>