plasma-framework/data/operations/storage.operations

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE kcfg SYSTEM
    "http://www.kde.org/standards/kcfg/1.0/kcfg.xsd">
<kcfg>
    <group name="save">
        <entry name="group" type="String">
            <label>Name of the source</label>
        </entry>
        <entry name="key" type="String">
            <label>Fill</label>
        </entry>
        <entry name="data" type="Int">
            <label>The actual data to be stored.</label>
        </entry>
        <entry name="data" type="String">
            <label>The actual data to be stored.</label>
        </entry>
        <entry name="data" type="StringList">
            <label>The actual data to be stored.</label>
        </entry>
  </group>
  <group name="retrieve">
      <entry name="group" type="String">
          <label>Name of the source</label>
      </entry>
      <entry name="key" type="String">
            <label>Fill</label>
        </entry>
  </group>
</kcfg>