diff --git a/pep-0426.txt b/pep-0426.txt
index b26795cfc..53bab059d 100644
--- a/pep-0426.txt
+++ b/pep-0426.txt
@@ -259,6 +259,10 @@ of the qualified name of the containing module or package, a colon (``:``)
 and the qualified name of the object relative to the containing module or
 package.
 
+A "prefixed name" starts with a qualified name, but is not necessarily a
+qualified name - it may contain additional dot separated segments which are
+not valid identifiers.
+
 
 Integration and deployment of distributions
 -------------------------------------------
@@ -1591,7 +1595,7 @@ previously installed, distribution.
 Example::
 
     "commands": {
-      "wrap_console": [{"wrapwithpython": "chair.run_cli"}],
+      "wrap_console": [{"wrapwithpython": "chair:run_cli"}],
       "wrap_gui": [{"wrapwithpythonw": "chair:run_gui"}],
       "prebuilt": ["notawrapper"]
     }
@@ -1601,7 +1605,7 @@ Example::
 Exports
 -------
 
-The ``exports`` field is a mapping containing qualified names as keys. Each
+The ``exports`` field is a mapping containing prefixed names as keys. Each
 key identifies an export group containing one or more exports published by
 the distribution.
 
@@ -1624,6 +1628,14 @@ appropriate definition for the export name format can allow the importing
 distribution to determine whether or not an export is relevant without
 needing to import every exporting module.
 
+Example::
+
+    "exports": {
+      "nose.plugins.0.10": {
+        "chairtest": "chair:NosePlugin"
+      }
+    }
+
 
 Install hooks
 =============
@@ -1738,7 +1750,7 @@ Metadata Extensions
 ===================
 
 Extensions to the metadata may be present in a mapping under the
-'extensions' key.  The keys must be valid qualified names, while
+'extensions' key.  The keys must be valid prefixed names, while
 the values may be any type natively supported in JSON::
 
     "extensions" : {
diff --git a/pep-0426/pydist-schema.json b/pep-0426/pydist-schema.json
index acbe843da..4be68cd30 100644
--- a/pep-0426/pydist-schema.json
+++ b/pep-0426/pydist-schema.json
@@ -191,7 +191,8 @@
     },
     "extensions": {
       "description": "Extensions to the metadata may be present in a mapping under the 'extensions' key.",
-      "type": "object"
+      "type": "object",
+      "$ref": "#/definitions/extensions"
     }
   },
 
@@ -271,7 +272,7 @@
     "exports": {
       "type": "object",
       "patternProperties": {
-        "^[A-Za-z]([0-9A-Za-z_])*([.][A-Za-z]([0-9A-Za-z_])*)*$": {
+        "^[A-Za-z][0-9A-Za-z_]*([.][0-9A-Za-z_]*)*$": {
           "type": "object",
           "patternProperties": {
             ".": {
@@ -284,6 +285,13 @@
       },
       "additionalProperties": false
     },
+    "extensions": {
+      "type": "object",
+      "patternProperties": {
+        "^[A-Za-z][0-9A-Za-z_]*([.][0-9A-Za-z_]*)*$": {}
+      },
+      "additionalProperties": false
+    },
     "command_map": {
       "type": "object",
       "patternProperties": {
@@ -324,6 +332,10 @@
     "qualified_name" : {
         "type": "string",
         "pattern": "^[A-Za-z_][A-Za-z_0-9]*([.][A-Za-z_][A-Za-z_0-9]*)*$"
+    },
+    "prefixed_name" : {
+        "type": "string",
+        "pattern": "^[A-Za-z_][A-Za-z_0-9]*([.][A-Za-z_0-9]*)*$"
     }
   }
 }