This file is indexed.

/usr/share/vlc/skins2/skin.dtd is in vlc-data 2.2.2-5.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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<!-- version 2.0
-->


<!ELEMENT Theme (ThemeInfo,(Include|IniFile|Bitmap|BitmapFont|Font|PopupMenu|Window)*)>
    <!ATTLIST Theme
        version     CDATA   #REQUIRED
        tooltipfont CDATA   "defaultfont"
        magnet      CDATA   "15"
        alpha       CDATA   "255"
        movealpha   CDATA   "255"
    >

<!-- main elements -->
<!ELEMENT IniFile EMPTY>
    <!ATTLIST IniFile
        id          CDATA   #REQUIRED
        file        CDATA   #REQUIRED
    >
<!ELEMENT Include EMPTY>
    <!ATTLIST Include
        file        CDATA   #REQUIRED
    >
<!ELEMENT Bitmap (SubBitmap)*>
    <!ATTLIST Bitmap
        id          CDATA   #REQUIRED
        file        CDATA   #REQUIRED
        alphacolor  CDATA   #REQUIRED
        nbframes    CDATA   "1"
        fps         CDATA   "0"
        loop        CDATA   "0"
    >
<!ELEMENT SubBitmap EMPTY>
    <!ATTLIST SubBitmap
        id          CDATA   #REQUIRED
        x           CDATA   #REQUIRED
        y           CDATA   #REQUIRED
        width       CDATA   #REQUIRED
        height      CDATA   #REQUIRED
        nbframes    CDATA   "1"
        fps         CDATA   "0"
        loop        CDATA   "0"
    >
<!ELEMENT Font EMPTY>
    <!ATTLIST Font
        id          CDATA   #REQUIRED
        file        CDATA   #REQUIRED
        size        CDATA   "12"
    >
<!ELEMENT BitmapFont EMPTY>
    <!ATTLIST BitmapFont
        id          CDATA   #REQUIRED
        file        CDATA   #REQUIRED
        type        CDATA   "digits"
    >
<!ELEMENT PopupMenu (MenuItem|MenuSeparator)+>
    <!ATTLIST PopupMenu
        id          CDATA   #REQUIRED
    >
<!ELEMENT MenuItem EMPTY>
    <!ATTLIST MenuItem
        label       CDATA   #REQUIRED
        action      CDATA   "none"
    >
<!ELEMENT MenuSeparator EMPTY>
<!ELEMENT ThemeInfo EMPTY>
    <!ATTLIST ThemeInfo
        name        CDATA   #IMPLIED
        author      CDATA   #IMPLIED
        email       CDATA   #IMPLIED
        webpage     CDATA   #IMPLIED
    >
<!ELEMENT Window (Layout)+>
    <!ATTLIST Window
        id          CDATA   "none"
        visible     CDATA   "true"
        x           CDATA   "0"
        y           CDATA   "0"
        position    CDATA   "-1"
        xoffset     CDATA    "0"
        yoffset     CDATA    "0"
        xmargin     CDATA    "0"
        ymargin     CDATA    "0"
        dragdrop    CDATA   "true"
        playondrop  CDATA   "true"
    >
<!ELEMENT Layout (Group|Image|Button|Playlist|Slider|RadialSlider|Text|Checkbox|
                  Anchor|Video|Playtree|Panel)+>
    <!ATTLIST Layout
        id          CDATA   "none"
        width       CDATA   #REQUIRED
        height      CDATA   #REQUIRED
        minwidth    CDATA   "-1"
        maxwidth    CDATA   "-1"
        minheight   CDATA   "-1"
        maxheight   CDATA   "-1"
    >
<!-- Grouping elements -->
<!ELEMENT Group (Group|Image|Button|Playlist|Slider|RadialSlider|Text|Checkbox|
                 Anchor|Video|Playtree|Panel)+>
    <!ATTLIST Group
        id          CDATA   "none"
        x           CDATA   "0"
        y           CDATA   "0"
    >
<!ELEMENT Panel (Group|Image|Button|Playlist|Slider|RadialSlider|Text|Checkbox|
                 Anchor|Video|Playtree|Panel)+>
    <!ATTLIST Panel
        id          CDATA   "none"
        x           CDATA   "0"
        y           CDATA   "0"
        lefttop     CDATA   "lefttop"
        rightbottom CDATA   "lefttop"
        xkeepratio  CDATA   "false"
        ykeepratio  CDATA   "false"
        width       CDATA   #REQUIRED
        height      CDATA   #REQUIRED
        position    CDATA   "-1"
        xoffset     CDATA    "0"
        yoffset     CDATA    "0"
        xmargin     CDATA    "0"
        ymargin     CDATA    "0"
    >

<!-- Anchors -->
<!ELEMENT Anchor EMPTY>
    <!ATTLIST Anchor
        id          CDATA   "none"
        x           CDATA   "0"
        y           CDATA   "0"
        lefttop     CDATA   "lefttop"
        priority    CDATA   #REQUIRED
        points      CDATA   "(0,0)"
        range       CDATA   "10"
    >

<!-- Controls -->
<!ELEMENT Image EMPTY>
    <!ATTLIST Image
        id          CDATA   "none"
        visible     CDATA   "true"
        x           CDATA   "0"
        y           CDATA   "0"
        width       CDATA   "-1"
        height      CDATA   "-1"
        lefttop     CDATA   "lefttop"
        rightbottom CDATA   "lefttop"
        xkeepratio  CDATA   "false"
        ykeepratio  CDATA   "false"
        image       CDATA   #REQUIRED
        action      CDATA   "none"
        action2     CDATA   "none"
        resize      CDATA   "mosaic"
        help        CDATA   ""
        art         CDATA   "false"
    >
<!ELEMENT Button EMPTY>
    <!ATTLIST Button
        id          CDATA   "none"
        visible     CDATA   "true"
        x           CDATA   "0"
        y           CDATA   "0"
        lefttop     CDATA   "lefttop"
        rightbottom CDATA   "lefttop"
        xkeepratio  CDATA   "false"
        ykeepratio  CDATA   "false"
        up          CDATA   #REQUIRED
        down        CDATA   "none"
        over        CDATA   "none"
        action      CDATA   "none"
        tooltiptext CDATA   ""
        help        CDATA   ""
    >
<!ELEMENT Checkbox EMPTY>
    <!ATTLIST Checkbox
        id           CDATA   "none"
        visible      CDATA   "true"
        x            CDATA   "0"
        y            CDATA   "0"
        lefttop      CDATA   "lefttop"
        rightbottom  CDATA   "lefttop"
        xkeepratio  CDATA   "false"
        ykeepratio  CDATA   "false"
        up1          CDATA   #REQUIRED
        down1        CDATA   "none"
        over1        CDATA   "none"
        up2          CDATA   #REQUIRED
        down2        CDATA   "none"
        over2        CDATA   "none"
        state        CDATA   #REQUIRED
        action1      CDATA   "none"
        action2      CDATA   "none"
        tooltiptext1 CDATA   ""
        tooltiptext2 CDATA   ""
        help         CDATA   ""
    >
<!ELEMENT Slider (SliderBackground)?>
    <!ATTLIST Slider
        id          CDATA   "none"
        visible     CDATA   "true"
        x           CDATA   "0"
        y           CDATA   "0"
        width       CDATA   "-1"
        height      CDATA   "-1"
        lefttop     CDATA   "lefttop"
        rightbottom CDATA   "lefttop"
        xkeepratio  CDATA   "false"
        ykeepratio  CDATA   "false"
        up          CDATA   #REQUIRED
        down        CDATA   "none"
        over        CDATA   "none"
        points      CDATA   #REQUIRED
        thickness   CDATA   "10"
        value       CDATA   "none"
        background  CDATA   "none"
        tooltiptext CDATA   ""
        help        CDATA   ""
    >
<!ELEMENT SliderBackground EMPTY>
    <!ATTLIST SliderBackground
        id          CDATA   "none"
        image       CDATA   #REQUIRED
        nbhoriz     CDATA   "1"
        nbvert      CDATA   "1"
        padhoriz    CDATA   "0"
        padvert     CDATA   "0"
    >
<!ELEMENT RadialSlider EMPTY>
    <!ATTLIST RadialSlider
        id          CDATA   "none"
        visible     CDATA   "true"
        x           CDATA   "0"
        y           CDATA   "0"
        lefttop     CDATA   "lefttop"
        rightbottom CDATA   "lefttop"
        xkeepratio  CDATA   "false"
        ykeepratio  CDATA   "false"
        sequence    CDATA   #REQUIRED
        nbimages    CDATA   #REQUIRED
        minangle    CDATA   "0"
        maxangle    CDATA   "360"
        value       CDATA   "none"
        tooltiptext CDATA   ""
        help        CDATA   ""
    >
<!ELEMENT Text EMPTY>
    <!ATTLIST Text
        id          CDATA   "none"
        visible     CDATA   "true"
        x           CDATA   "0"
        y           CDATA   "0"
        width       CDATA   "0"
        lefttop     CDATA   "lefttop"
        rightbottom CDATA   "lefttop"
        xkeepratio  CDATA   "false"
        ykeepratio  CDATA   "false"
        text        CDATA   ""
        font        CDATA   #REQUIRED
        color       CDATA   "#000000"
        scrolling   CDATA   "auto"
        alignment   CDATA   "left"
        focus       CDATA   "true"
        help        CDATA   ""
    >
<!ELEMENT Playlist (Slider)?>
    <!ATTLIST Playlist
        id          CDATA   #REQUIRED
        visible     CDATA   "true"
        x           CDATA   "0"
        y           CDATA   "0"
        width       CDATA   "0"
        height      CDATA   "0"
        position    CDATA   "-1"
        xoffset     CDATA    "0"
        yoffset     CDATA    "0"
        xmargin     CDATA    "0"
        ymargin     CDATA    "0"
        lefttop     CDATA   "lefttop"
        rightbottom CDATA   "lefttop"
        xkeepratio  CDATA   "false"
        ykeepratio  CDATA   "false"
        font        CDATA   #REQUIRED
        bgimage     CDATA   "none"
        fgcolor     CDATA   "#000000"
        playcolor   CDATA   "#FF0000"
        bgcolor1    CDATA   "#FFFFFF"
        bgcolor2    CDATA   "#FFFFFF"
        selcolor    CDATA   "#0000FF"
        help        CDATA   ""
    >
<!ELEMENT Playtree (Slider)?>
    <!ATTLIST Playtree
        id          CDATA   #REQUIRED
        visible     CDATA   "true"
        x           CDATA   "0"
        y           CDATA   "0"
        width       CDATA   "0"
        height      CDATA   "0"
        position    CDATA   "-1"
        xoffset     CDATA    "0"
        yoffset     CDATA    "0"
        xmargin     CDATA    "0"
        ymargin     CDATA    "0"
        lefttop     CDATA   "lefttop"
        rightbottom CDATA   "lefttop"
        xkeepratio  CDATA   "false"
        ykeepratio  CDATA   "false"
        font        CDATA   #REQUIRED
        bgimage     CDATA   "none"
        itemimage   CDATA   "none"
        openimage   CDATA   "none"
        closedimage CDATA   "none"
        fgcolor     CDATA   "#000000"
        playcolor   CDATA   "#FF0000"
        bgcolor1    CDATA   "#FFFFFF"
        bgcolor2    CDATA   "#FFFFFF"
        selcolor    CDATA   "#0000FF"
        help        CDATA   ""
        flat        CDATA   "false"
    >
<!ELEMENT Video EMPTY>
    <!ATTLIST Video
        id          CDATA   "none"
        visible     CDATA   "true"
        x           CDATA   "0"
        y           CDATA   "0"
        width       CDATA   "0"
        height      CDATA   "0"
        position    CDATA   "-1"
        xoffset     CDATA    "0"
        yoffset     CDATA    "0"
        xmargin     CDATA    "0"
        ymargin     CDATA    "0"
        lefttop     CDATA   "lefttop"
        rightbottom CDATA   "lefttop"
        xkeepratio  CDATA   "false"
        ykeepratio  CDATA   "false"
        autoresize  CDATA   "true"
        help        CDATA   ""
    >