More docs

git-svn-id: http://pyfilesystem.googlecode.com/svn/trunk@641 67cdc799-7952-0410-af00-57a81ceafa0f

1 files changed, 7 insertions, 1 deletions

diff --git a/docs/interface.rst b/docs/interface.rst
index bf3ae9a..f39ed65 100644
--- a/docs/interface.rst
+++ b/docs/interface.rst
@@ -9,6 +9,8 @@ It may also be worthwhile implementing some of the non-essential methods, as the
 
 If the filesystem you are implementing maps paths to the native filesystem, be sure to implement :py:meth:`~fs.base.FS.getsyspath`. Doing so will improve performance, especially when copying / moving files between FS objects.
 
+.. _essential-methods:
+
 Essential Methods
 -----------------
 
@@ -25,6 +27,8 @@ The following methods are required for a minimal Filesystem interface:
     * :meth:`~fs.base.FS.getinfo` Return information about the path e.g. size, mtime
     
 
+.. _non-essential-methods:
+
 Non - Essential Methods
 -----------------------
 
@@ -46,10 +50,12 @@ The following methods have default implementations in :py:class:`fs.base.FS` and
     * :meth:`~fs.base.FS.move` Move a file to a new location        
     * :meth:`~fs.base.FS.movedir` Recursively move a directory to a new location
     * :meth:`~fs.base.FS.opendir` Opens a directory and returns an FS object that represents it
-    * :meth:`~fs.base.FS.safeopen` Like :meth:`~fs.base.open` but returns a NullFile if the file could not be opened
+    * :meth:`~fs.base.FS.safeopen` Like :meth:`~fs.base.FS.open` but returns a :class:`~fs.base.NullFile` if the file could not be opened
     * :meth:`~fs.base.FS.settimes` Sets the accessed and modified times of a path
 
 
+.. _utility-methods:
+
 Utility Methods
 ---------------