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

<plugin>
  <name>metadata</name>
  <description>Metadata (EXIF, IPTC and XMP) image (JPEG, TIFF) parser and muxer</description>
  <filename>../../ext/metadata/.libs/libgstmetadata.so</filename>
  <basename>libgstmetadata.so</basename>
  <version>0.10.5.1</version>
  <license>LGPL</license>
  <source>gst-plugins-bad</source>
  <package>GStreamer Bad Plug-ins CVS/prerelease</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>metadatamux</name>
      <longname>Metadata muxer</longname>
      <class>Muxer/Metadata</class>
      <description>Convert tags to metadata (EXIF, IPTC and XMP) and insert into the stream</description>
      <author>Edgard Lima &lt;edgard.lima@indt.org.br&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>image/jpeg, tags-extracted=(boolean)true; image/png, tags-extracted=(boolean)true</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>image/jpeg; image/png</details>
        </caps>
      </pads>
    </element>
    <element>
      <name>metadataparse</name>
      <longname>Metadata parser</longname>
      <class>Parser/Extracter/Metadata</class>
      <description>Send metadata tags (EXIF, IPTC and XMP) while passing throught the contents</description>
      <author>Edgard Lima &lt;edgard.lima@indt.org.br&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>image/jpeg, tags-extracted=(boolean)false; image/png, tags-extracted=(boolean)false</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>image/jpeg, tags-extracted=(boolean)true; image/png, tags-extracted=(boolean)true</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>