Docs: udev.xml: Use `unless' for clarity

[elogind.git] / udev / udev.xml

diff --git a/udev/udev.xml b/udev/udev.xml
index d777570eb8113ddacd4d1311aaf1f4cdc6dbd468..3b1b4f83de7f1c3c3364b163f486a7bbf2deb019 100644 (file)
--- a/udev/udev.xml
+++ b/udev/udev.xml
@@ -83,17 +83,17 @@
       <para>Rule files must have the extension <filename>.rules</filename>; other
       extensions are ignored.</para>
 
-      <para>Every line in the rules file contains at least one key value pair.
-      There are two kind of keys, match and assignment keys.
+      <para>Every line in the rules file contains at least one key-value pair.
+      There are two kind of keys: match and assignment.
       If all match keys are matching against its value, the rule gets applied and the
-      assign keys get the specified value assigned.</para>
+      assignment keys get the specified value assigned.</para>
 
       <para>A matching rule may rename a network interface, add symlinks
       pointing to the device node, or run a specified program as part of
       the event handling.</para>
 
-      <para>A rule consists of a list of one or more key value pairs separated by
-      a comma. Each key has a distinct operation, depending on the used operator. Valid
+      <para>A rule consists of a comma-separated list of one or more key-value pairs.
+      Each key has a distinct operation, depending on the used operator. Valid
       operators are:</para>
       <variablelist>
         <varlistentry>
@@ -128,8 +128,7 @@
         <varlistentry>
           <term><option>:=</option></term>
           <listitem>
-            <para>Assign  a  value  to  a key finally; disallow any later changes,
-            which may be used to prevent changes by any later rules.</para>
+            <para>Assign  a  value  to  a key finally; disallow any later changes.</para>
           </listitem>
         </varlistentry>
       </variablelist>
@@ -189,7 +188,7 @@
         <varlistentry>
           <term><option>DRIVER</option></term>
           <listitem>
-            <para>Match the driver name of the event device. Only set for devices
+            <para>Match the driver name of the event device. Only set this key for devices
             which are bound to a driver at the time the event is generated.</para>
           </listitem>
         </varlistentry>
@@ -197,8 +196,8 @@
           <term><option>ATTR{<replaceable>filename</replaceable>}</option></term>
           <listitem>
             <para>Match sysfs attribute values of the event device. Trailing
-            whitespace in the attribute values is ignored, if the specified match
-            value does not contain trailing whitespace itself.
+            whitespace in the attribute values is ignored unless the specified match
+            value itself contains trailing whitespace.
             </para>
           </listitem>
         </varlistentry>
@@ -229,8 +228,8 @@
           <listitem>
             <para>Search the devpath upwards for a device with matching sysfs attribute values.
             If multiple <option>ATTRS</option> matches are specified, all of them
-            must match on the same device. Trailing whitespace in the attribute values is ignored,
-            if the specified match value does not contain trailing whitespace itself.</para>
+            must match on the same device. Trailing whitespace in the attribute values is ignored
+            unless the specified match value itself contains trailing whitespace.</para>
           </listitem>
         </varlistentry>