Spotify's Commands in its SDEF file

Spotify's Commands in its SDEF file.xml

<command name="next track" code="spfyNext" description="Skip to the next track.">
    <access-group identifier="com.spotify.playback"/>
    <cocoa class="SPNextTrackScriptCommand"/>
</command>
<command name="previous track" code="spfyPrev" description="Skip to the previous track.">
    <access-group identifier="com.spotify.playback"/>
    <cocoa class="SPPreviousTrackScriptCommand"/>
</command>
<command name="playpause" code="spfyPlPs" description="Toggle play/pause.">
    <access-group identifier="com.spotify.playback"/>
    <cocoa class="SPPlayPauseScriptCommand"/>
</command>
<command name="pause" code="spfyPaus" description="Pause playback.">
    <access-group identifier="com.spotify.playback"/>
    <cocoa class="SPPauseScriptCommand"/>
</command>
<command name="play" code="spfyPlay" description="Resume playback.">
    <access-group identifier="com.spotify.playback"/>
    <cocoa class="SPPlayScriptCommand"/>
</command>
<command name="play track" code="spfyPCtx" description="Start playback of a track in the given context.">
    <access-group identifier="com.spotify.playback"/>
    <cocoa class="SPPlayTrackScriptCommand"/>
    <direct-parameter description="the URI of the track to play" type="text"/>
    <parameter name="in context" code="cotx" description="the URI of the context to play in" type="text" optional="yes">
        <cocoa key="context"/>
    </parameter>
</command>