Improve documentation of delegation rules

diff --git a/docs/usage/delegation.md b/docs/usage/delegation.md
index 3643cd7..df64f96 100644
--- a/docs/usage/delegation.md
+++ b/docs/usage/delegation.md
@@ -2,7 +2,7 @@ 
 
 Autodelegation allows patches to be automatically delegated to a user based on
 the files modified by the patch. To do this, a number of rules can be
-configured in the project admininstration page. This can usually be found at
+configured in the project administration page. This can usually be found at
 `/admin/patchwork/project/<project_id>/change`.
 
 **NOTE:** Autodelegation can only be configured by Patchwork administrators,
@@ -11,17 +11,35 @@  autodelegation rules on a local instance, contact your Patchwork administrator.
 
 In this section there are the following fields:
 
-<dl>
-  <dt>Path</dt>
-  <dd>A path in <a href="https://docs.python.org/2/library/fnmatch.html">
-  fnmatch</a> format. The fnmatch library allows for limited, Unix shell-style
-  wildcarding</dd>
-  <dt>User</dt>
-  <dd>The patchwork user that should be autodelegated to the patch</dd>
-  <dt>Priority</dt>
-  <dd>The priority of the rule relative to other patches. Higher values
-  indicate higher priority</dd>
-</dl>
-
-Rules should be configured by setting the above fields and saving the rules.
-These rules will be applied at patch parse time.
+- User
+
+  The patchwork user that should be autodelegated to the patch
+
+- Priority
+
+  The priority of the rule relative to other patches. Higher values
+  indicate higher priority. If two rules have the same priority, ordering will
+  be based on the path.
+
+- Path
+
+  A path in [fnmatch](https://docs.python.org/2/library/fnmatch.html) format.
+  The fnmatch library allows for limited, Unix shell-style wildcarding.
+  Filenames are extracted from patch lines beginning with `--- ` or `+++ `.
+  Note that for projects using Git or Mercurial, the tools these VCS provide
+  for producing patches are prefixed with `a` or `b`. You should account for
+  this in your path. For example, to match the path `patchwork/views` (relative
+  to the top of a Git repo) your pattern should be:
+
+      ?/patchwork/views/*
+
+  It is also possible to use relative paths, such as:
+
+      */manage.py
+
+  For projects using other VCS like Subversion can simply use a bare path:
+
+     patchwork/views/*
+
+Rules are configured by setting the above fields and saving the rules. These
+rules will be applied at patch parse time.
diff --git a/patchwork/migrations/0017_improved_delegation_rule_docs.py b/patchwork/migrations/0017_improved_delegation_rule_docs.py
new file mode 100644
index 0000000..138b08f
--- /dev/null
+++ b/patchwork/migrations/0017_improved_delegation_rule_docs.py
@@ -0,0 +1,32 @@ 
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.5 on 2017-02-08 00:19
+from __future__ import unicode_literals
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('patchwork', '0016_series_project'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='delegationrule',
+            name='path',
+            field=models.CharField(help_text=b'An fnmatch-style pattern to match filenames against', max_length=255),
+        ),
+        migrations.AlterField(
+            model_name='delegationrule',
+            name='priority',
+            field=models.IntegerField(default=0, help_text=b'The priority of the rule. Rules with a higher priority will override rules with lower priorities'),
+        ),
+        migrations.AlterField(
+            model_name='delegationrule',
+            name='user',
+            field=models.ForeignKey(help_text=b'A user to delegate the patch to.', on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
+        ),
+    ]
diff --git a/patchwork/models.py b/patchwork/models.py
index ea40fbf..5950b19 100644
--- a/patchwork/models.py
+++ b/patchwork/models.py
@@ -100,10 +100,17 @@  class Project(models.Model):
 
 @python_2_unicode_compatible
 class DelegationRule(models.Model):
-    user = models.ForeignKey(User)
-    path = models.CharField(max_length=255)
     project = models.ForeignKey(Project)
-    priority = models.IntegerField(default=0)
+    user = models.ForeignKey(
+        User,
+        help_text='A user to delegate the patch to.')
+    path = models.CharField(
+        max_length=255,
+        help_text='An fnmatch-style pattern to match filenames against')
+    priority = models.IntegerField(
+        default=0,
+        help_text='The priority of the rule. Rules with a higher priority '
+        'will override rules with lower priorities')
 
     def __str__(self):
         return self.path