2 files changed, 34 insertions, 9 deletions
diff --git a/lib/puppet/parser/functions/defined.rb b/lib/puppet/parser/functions/defined.rb
index 90632af2f..2aeaa9ba0 100644
--- a/lib/puppet/parser/functions/defined.rb
+++ b/lib/puppet/parser/functions/defined.rb
@@ -1,10 +1,32 @@
 # Test whether a given class or definition is defined
-Puppet::Parser::Functions::newfunction(:defined, :type => :rvalue, :doc => "Determine whether a given
-  type is defined, either as a native type or a defined type, or whether a class is defined.
-  This is useful for checking whether a class is defined and only including it if it is.
-  This function can also test whether a resource has been defined, using resource references
-  (e.g., `if defined(File['/tmp/myfile']) { ... }`).  This function is unfortunately
-  dependent on the parse order of the configuration when testing whether a resource is defined.") do |vals|
+Puppet::Parser::Functions::newfunction(:defined, :type => :rvalue, :doc => "Determine whether
+  a given class or resource type is defined. This function can also determine whether a
+  specific resource has been declared. Returns true or false. Accepts class names,
+  type names, and resource references.
+
+  The `defined` function checks both native and defined types, including types
+  provided as plugins via modules. Types and classes are both checked using their names:
+
+      defined(\"file\")
+      defined(\"customtype\")
+      defined(\"foo\")
+      defined(\"foo::bar\")
+
+  Resource declarations are checked using resource references, e.g.
+  `defined( File['/tmp/myfile'] )`. Checking whether a given resource
+  has been declared is, unfortunately, dependent on the parse order of
+  the configuration, and the following code will not work:
+
+      if defined(File['/tmp/foo']) {
+          notify(\"This configuration includes the /tmp/foo file.\")
+      }
+      file {\"/tmp/foo\":
+          ensure => present,
+      }
+
+  However, this order requirement refers to parse order only, and ordering of
+  resources in the configuration graph (e.g. with `before` or `require`) does not
+  affect the behavior of `defined`.") do |vals|
     result = false
     vals = [vals] unless vals.is_a?(Array)
     vals.each do |val|
diff --git a/lib/puppet/parser/functions/fqdn_rand.rb b/lib/puppet/parser/functions/fqdn_rand.rb
index 3e7018ac4..52946f2c1 100644
--- a/lib/puppet/parser/functions/fqdn_rand.rb
+++ b/lib/puppet/parser/functions/fqdn_rand.rb
@@ -1,7 +1,10 @@
 Puppet::Parser::Functions::newfunction(:fqdn_rand, :type => :rvalue, :doc =>
-  "Generates random numbers based on the node's fqdn. The first argument
-  sets the range.  Additional (optional) arguments may be used to further
-  distinguish the seed.") do |args|
+  "Generates random numbers based on the node's fqdn. Generated random values
+  will be a range from 0 up to and excluding n, where n is the first parameter.
+  The second argument specifies a number to add to the seed and is optional, for example:
+
+      $random_number = fqdn_rand(30)
+      $random_number_seed = fqdn_rand(30,30)") do |args|
     require 'md5'
     max = args.shift
     srand MD5.new([lookupvar('fqdn'),args].join(':')).to_s.hex