This file is indexed.

/usr/share/dbus-1/interfaces/org.freedesktop.UPower.Device.xml is in upower 0.9.23-2ubuntu1.

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The actual contents of the file can be viewed below.

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<!DOCTYPE node PUBLIC
"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd" [
  <!ENTITY ERROR_GENERAL "org.freedesktop.UPower.Device.GeneralError">
]>
<node name="/" xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd">
  <interface name="org.freedesktop.UPower.Device">
    <doc:doc>
      <doc:description>
        <doc:para>
          Objects implementing this interface are usually discovered through
          the <doc:tt>org.freedesktop.UPower</doc:tt> interface on
          the <doc:tt>/org/freedesktop/UPower</doc:tt> object on
          the D-Bus system bus service with the well-known
          name <doc:tt>org.freedesktop.UPower</doc:tt> using
          the
          <doc:ref type="method" to="Power.EnumerateDevices">EnumerateDevices</doc:ref>
          method.
        </doc:para>
        <doc:para>
          <doc:example language="shell" title="simple example">
            <doc:code>
$ dbus-send --print-reply \
            --system \
            --dest=org.freedesktop.UPower \
            /org/freedesktop/UPower/devices/battery_BAT0 \
            org.freedesktop.DBus.Properties.GetAll \
            string:org.freedesktop.UPower.Device

method return sender=:1.386 -> dest=:1.477 reply_serial=2
   array [
      dict entry(
         string "native-path"
         variant             string "/sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/PNP0C09:00/PNP0C0A:00/power_supply/BAT0"
      )
      dict entry(
         string "vendor"
         variant             string "SONY"
      )
      dict entry(
         string "model"
         variant             string "42T4568"
      )
      dict entry(
         string "serial"
         variant             string "4179"
      )
      dict entry(
         string "update-time"
         variant             uint64 1226417875
      )
      dict entry(
         string "type"
         variant             uint 2
      )
      dict entry(
         string "power-supply"
         variant             boolean true
      )
      dict entry(
         string "has-history"
         variant             boolean true
      )
      dict entry(
         string "has-statistics"
         variant             boolean true
      )
      dict entry(
         string "online"
         variant             boolean false
      )
      dict entry(
         string "energy"
         variant             double 72.85
      )
      dict entry(
         string "energy-empty"
         variant             double 0
      )
      dict entry(
         string "energy-full"
         variant             double 74.55
      )
      dict entry(
         string "energy-full-design"
         variant             double 74.88
      )
      dict entry(
         string "energy-rate"
         variant             double 0
      )
      dict entry(
         string "voltage"
         variant             double 16.415
      )
      dict entry(
         string "time-to-empty"
         variant             int64 0
      )
      dict entry(
         string "time-to-full"
         variant             int64 0
      )
      dict entry(
         string "percentage"
         variant             double 97.7197
      )
      dict entry(
         string "is-present"
         variant             boolean true
      )
      dict entry(
         string "state"
         variant             uint 3
      )
      dict entry(
         string "is-rechargeable"
         variant             boolean true
      )
      dict entry(
         string "capacity"
         variant             double 100
      )
      dict entry(
         string "technology"
         variant             uint 1
      )
   ]
            </doc:code>
          </doc:example>
        </doc:para>
        <doc:para>
          Unless otherwise noted, an empty string or the value 0 in a
          property on this interface means not set.
        </doc:para>
      </doc:description>
    </doc:doc>


    <!-- ************************************************************ -->
    <method name="Refresh">
      <annotation name="org.freedesktop.DBus.GLib.Async" value=""/>
      <doc:doc>
        <doc:description>
          <doc:para>
            Refreshes the data collected from the power source.
          </doc:para>
        </doc:description>
        <doc:permission>Callers need the org.freedesktop.upower.refresh-power-source authorization</doc:permission>
        <doc:errors>
          <doc:error name="&ERROR_GENERAL;">if an error occured while refreshing</doc:error>
        </doc:errors>
      </doc:doc>
    </method>

    <!-- ************************************************************ -->
    <signal name="Changed">
      <doc:doc>
        <doc:description>
          <doc:para>
            Some value on the power source changed.
          </doc:para>
        </doc:description>
      </doc:doc>
    </signal>

    <!-- ************************************************************ -->
    <method name="GetHistory">
      <annotation name="org.freedesktop.DBus.GLib.Async" value=""/>
      <arg name="type" direction="in" type="s">
        <doc:doc><doc:summary>The type of history.
        Valid types are <doc:tt>rate</doc:tt> or <doc:tt>charge</doc:tt>.</doc:summary></doc:doc>
      </arg>
      <arg name="timespan" direction="in" type="u">
        <doc:doc><doc:summary>The amount of data to return in seconds, or 0 for all.</doc:summary></doc:doc>
      </arg>
      <arg name="resolution" direction="in" type="u">
        <doc:doc>
          <doc:summary>
            The approximate number of points to return.
            A higher resolution is more accurate, at the expense of plotting speed.
          </doc:summary>
        </doc:doc>
      </arg>
      <arg name="data" direction="out" type="a(udu)">
        <doc:doc><doc:summary>
            The history data for the power device, if the device supports history.
            Data is ordered from the earliest in time, to the newest data point.
            Each element contains the following members:
            <doc:list>
              <doc:item>
                <doc:term>time</doc:term>
                <doc:definition>
                  The time value in seconds from the <doc:tt>gettimeofday()</doc:tt> method.
                </doc:definition>
              </doc:item>
              <doc:item>
                <doc:term>value</doc:term>
                <doc:definition>
                  The data value, for instance the rate in W or the charge in %.
                </doc:definition>
              </doc:item>
              <doc:item>
                <doc:term>state</doc:term>
                <doc:definition>
                  The state of the device, for instance <doc:tt>charging</doc:tt> or
                  <doc:tt>discharging</doc:tt>.
                </doc:definition>
              </doc:item>
            </doc:list>
        </doc:summary></doc:doc>
      </arg>
      <doc:doc>
        <doc:description>
          <doc:para>
            Gets history for the power device that is persistent across reboots.
          </doc:para>
        </doc:description>
      </doc:doc>
    </method>

    <!-- ************************************************************ -->
    <method name="GetStatistics">
      <annotation name="org.freedesktop.DBus.GLib.Async" value=""/>
      <arg name="type" direction="in" type="s">
        <doc:doc><doc:summary>The mode for the statistics.
        Valid types are <doc:tt>charging</doc:tt> or <doc:tt>discharging</doc:tt>.</doc:summary></doc:doc>
      </arg>
      <arg name="data" direction="out" type="a(dd)">
        <doc:doc><doc:summary>
            The statistics data for the power device.
            Each element contains the following members:
            <doc:list>
              <doc:item>
                <doc:term>value</doc:term>
                <doc:definition>
                  The value of the percentage point, usually in seconds
                </doc:definition>
              </doc:item>
              <doc:item>
                <doc:term>accuracy</doc:term>
                <doc:definition>
                  The accuracy of the prediction in percent.
                </doc:definition>
              </doc:item>
            </doc:list>
        </doc:summary></doc:doc>
      </arg>
      <doc:doc>
        <doc:description>
          <doc:para>
            Gets statistics for the power device that may be interesting
            to show on a graph in the session.
          </doc:para>
        </doc:description>
      </doc:doc>
    </method>

    <!-- ************************************************************ -->
    <property name="NativePath" type="s" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            OS specific native path of the power source. On Linux this
            is the sysfs path, for
            example <doc:tt>/sys/devices/LNXSYSTM:00/device:00/PNP0C0A:00/power_supply/BAT0</doc:tt>. Is
            blank if the device is being driven by a user space
            driver.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Vendor" type="s" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Name of the vendor of the battery.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Model" type="s" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Name of the model of this battery.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Serial" type="s" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Unique serial number of the battery.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="UpdateTime" type="t" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            The point in time (seconds since the Epoch Jan 1, 1970
            0:00 UTC) that data was read from the power source.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Type" type="u" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Type of power source.
          </doc:para>
          <doc:list>
            <doc:item>
              <doc:term>0</doc:term><doc:definition>Unknown</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>1</doc:term><doc:definition>Line Power</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>2</doc:term><doc:definition>Battery</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>3</doc:term><doc:definition>Ups</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>4</doc:term><doc:definition>Monitor</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>5</doc:term><doc:definition>Mouse</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>6</doc:term><doc:definition>Keyboard</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>7</doc:term><doc:definition>Pda</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>8</doc:term><doc:definition>Phone</doc:definition>
            </doc:item>
          </doc:list>
        </doc:description>
      </doc:doc>
    </property>

    <property name="PowerSupply" type="b" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            If the power device is used to supply the system.
            This would be set TRUE for laptop batteries and UPS devices,
            but set FALSE for wireless mice or PDAs.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="HasHistory" type="b" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            If the power device has history.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="HasStatistics" type="b" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            If the power device has statistics.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Online" type="b" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Whether power is currently being provided through line power.
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "line-power".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Energy" type="d" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Amount of energy (measured in Wh) currently available in
            the power source.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="EnergyEmpty" type="d" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Amount of energy (measured in Wh) in the power source when
            it's considered to be empty.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="EnergyFull" type="d" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Amount of energy (measured in Wh) in the power source when
            it's considered full.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="EnergyFullDesign" type="d" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Amount of energy (measured in Wh) the power source is
            designed to hold when it's considered full.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="EnergyRate" type="d" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Amount of energy being drained from the source, measured
            in W. If positive, the source is being discharged, if
            negative it's being charged.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Voltage" type="d" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Voltage in the Cell or being recorded by the meter.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Luminosity" type="d" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Luminosity being recorded by the meter.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="TimeToEmpty" type="x" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Number of seconds until the power source is considered empty.
            Is set to 0 if unknown.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="TimeToFull" type="x" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Number of seconds until the power source is considered full.
            Is set to 0 if unknown.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Percentage" type="d" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            The amount of energy left in the power source expressed as
            a percentage between 0 and 100. Typically this is the same as
            (<doc:ref type="property" to="Source:Energy">energy</doc:ref> -
            <doc:ref type="property" to="Source:EnergyEmpty">energy-empty</doc:ref>) /
            (<doc:ref type="property" to="Source:EnergyFull">energy-full</doc:ref> -
            <doc:ref type="property" to="Source:EnergyEmpty">energy-empty</doc:ref>).
            However, some primitive power sources are capable of only
            reporting percentages and in this case the energy-*
            properties will be unset while this property is set.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Temperature" type="d" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            The temperature of the device in degrees Celsius. This property is
            only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="IsPresent" type="b" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            If the power source is present in the bay.
            This field is required as some batteries are hot-removable, for example
            expensive UPS and most laptop batteries.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="State" type="u" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            The battery power state.
          </doc:para>
          <doc:list>
            <doc:item>
              <doc:term>0</doc:term><doc:definition>Unknown</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>1</doc:term><doc:definition>Charging</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>2</doc:term><doc:definition>Discharging</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>3</doc:term><doc:definition>Empty</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>4</doc:term><doc:definition>Fully charged</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>5</doc:term><doc:definition>Pending charge</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>6</doc:term><doc:definition>Pending discharge</doc:definition>
            </doc:item>
          </doc:list>
          <doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="IsRechargeable" type="b" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            If the power source is rechargeable.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Capacity" type="d" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            The capacity of the power source expressed as a percentage between 0 and 100.
            The capacity of the battery will reduce with age.
            A capacity value less than 75% is usually a sign that you should renew your battery.
            Typically this value is the same as
            (<doc:ref type="property" to="Source:FullDesign">full-design</doc:ref> /
            <doc:ref type="property" to="Source:Full">full</doc:ref>) * 100.
            However, some primitive power sources are not capable reporting capacity
            and in this case the capacity property will be unset.
          </doc:para><doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="Technology" type="u" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            Technology used in the battery:
          </doc:para>
          <doc:list>
            <doc:item>
              <doc:term>0</doc:term><doc:definition>Unknown</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>1</doc:term><doc:definition>Lithium ion</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>2</doc:term><doc:definition>Lithium polymer</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>3</doc:term><doc:definition>Lithium iron phosphate</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>4</doc:term><doc:definition>Lead acid</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>5</doc:term><doc:definition>Nickel cadmium</doc:definition>
            </doc:item>
            <doc:item>
              <doc:term>6</doc:term><doc:definition>Nickel metal hydride</doc:definition>
            </doc:item>
          </doc:list>
          <doc:para>
            This property is only valid if the property
            <doc:ref type="property" to="Source:Type">type</doc:ref>
            has the value "battery".
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="RecallNotice" type="b" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            If the device may have been recalled by the vendor due to a suspected
            fault.
            This key does not imply the device is faulty, only that it approximatly
            matches the description from the vendor of units that were recalled.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="RecallVendor" type="s" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            The vendor that is handling the hardware recall.
          </doc:para>
          <doc:para>
            This property is only valid if the property recall-notice is true.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

    <property name="RecallUrl" type="s" access="read">
      <doc:doc>
        <doc:description>
          <doc:para>
            The URL to visit about the hardware recall.
          </doc:para>
          <doc:para>
            This property is only valid if the property recall-notice is true.
          </doc:para>
        </doc:description>
      </doc:doc>
    </property>

  </interface>

</node>