/usr/share/gtk-doc/html/gupnp/schemas-service.html is in libgupnp-doc 0.20.10-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88  | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>GUPnP Reference Manual: Service Description</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="index.html" title="GUPnP Reference Manual">
<link rel="up" href="schemas.html" title="Part III. XML Schemas">
<link rel="prev" href="schemas-device.html" title="Device Description">
<link rel="next" href="glossary.html" title="Glossary">
<meta name="generator" content="GTK-Doc V1.20 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="10"><tr valign="middle">
<td width="100%" align="left" class="shortcuts"></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="schemas.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="schemas-device.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="glossary.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="chapter">
<div class="titlepage"><div><div><h2 class="title">
<a name="schemas-service"></a>Service Description</h2></div></div></div>
<p>
        This is the schema for the UPnP Service Description document, in the
        RELAX NG Compact syntax.
      </p>
<pre class="programlisting"># Relax NG schema for the UPnP Service Control Protocol Definition files.  See
# section 2.3 of UPnP Device Architecture 1.0 for the canonical reference.
default namespace = "urn:schemas-upnp-org:service-1-0"
start = scpd
scpd = element scpd {
   element specVersion {
      element major { text } &
      element minor { text }
   } &
   
   element actionList {
      element action {
         element name { text } &
         element argumentList {
            element argument {
               element name { text } &
               element direction { "in"|"out" } &
               element retval { text }? &
               element relatedStateVariable { text }
            }+
         }?
      }+
   }? &
   
   element serviceStateTable {
      element stateVariable {
         attribute sendEvents { "yes"|"no" }? &
         element name { text } &
         element dataType {
            "ui1"|"ui2"|"ui4"|"i1"|"i2"|"i4"|"int"|
            "r4"|"r8"|"number"|"fixed.14.4"|"float"|
            "char"|"string"|
            "date"|"dateTime"|"dateTime.tz"|"time"|"time.tz"|
            "boolean"|"bin.base64"|"bin.hex"|"uri"|"uuid"
         } &
         element defaultValue { text }? &
         (
            element allowedValueList {
               element allowedValue { text }+
            }
          |
            element allowedValueRange {
               element minimum { text } &
               element maximum { text } &
               element step { text }?
            }
         )?
      }+
   }
}
</pre>
</div>
<div class="footer">
<hr>
          Generated by GTK-Doc V1.20</div>
</body>
</html>
 |