1 files changed, 13 insertions, 9 deletions

diff --git a/doc/developer-guidelines.sgml b/doc/developer-guidelines.sgml
index ad6f59e..82dbeca 100644
--- a/doc/developer-guidelines.sgml
+++ b/doc/developer-guidelines.sgml
@@ -196,12 +196,18 @@
       
                 </section>
 
-                <section id="thresholdformat"><title>Threshold range format</title>
-                <para>Thresholds ranges define the warning and critical levels for plugins to 
-                alert on. The theory is that the plugin will do some sort of check which returns
+                <section id="thresholdformat"><title>Threshold and ranges</title>
+                <para>A range is defined as a start and end point (inclusive) on a numeric scale (possibly
+                negative or positive infinity).
+                </para>
+                <para>A threshold is a range with an alert level (either warning or critical). Use the
+                set_thresholds(thresholds *, char *, char *) function to set the thresholds.
+                </para>
+                <para>The theory is that the plugin will do some sort of check which returns
                 back a numerical value, or metric, which is then compared to the warning and 
-                critical thresholds.
-                This is the generalised format for threshold ranges:</para>
+                critical thresholds. Use the get_status(double, thresholds *) function to
+                compare the value against the thresholds.</para>
+                <para>This is the generalised format for ranges:</para>
 
                 <literallayout>
                 [@]start:end
@@ -226,10 +232,8 @@
                         </listitem>
                 </orderedlist>
                 
-                <para>Note: Not all plugins are coded to expect ranges in this format. It is
-                planned for a future release to
-                provide standard libraries to parse and compare metrics against ranges. There
-                will also be some work in providing multiple metrics.</para>
+                <para>Note: Not all plugins are coded to expect ranges in this format yet.
+                There will be some work in providing multiple metrics.</para>
                 </section>
 
                 <section><title>Performance data</title>