diff --git a/auto/Makefile b/auto/Makefile
index 9be637b..be100ae 100644
--- a/auto/Makefile
+++ b/auto/Makefile
@@ -111,11 +111,19 @@ $(EXT)/.dummy: OpenGL-Registry/.dummy EGL-Registry/.dummy
 	cp -r glfixes/gl/specs/ANGLE OpenGL-Registry/extensions
 	cp -r glfixes/gl/specs/REGAL OpenGL-Registry/extensions
 	$(BIN)/update_ext.sh $(EXT) OpenGL-Registry/extensions $(BLACKLIST)
-	$(BIN)/filter_gl_ext.sh $(EXT)
+	@echo "--------------------------------------------------------------------"
+	@echo "WGL descriptors"
+	@echo "--------------------------------------------------------------------"
+	rm -f $(EXT)/WGL_*
+	$(PYTHON) $(BIN)/parse_xml.py OpenGL-Registry/xml/wgl.xml --api wgl --extensions extensions/gl
 	@echo "--------------------------------------------------------------------"
 	@echo "EGL descriptors"
 	@echo "--------------------------------------------------------------------"
-	$(PYTHON) $(BIN)/parse_xml.py EGL-Registry/api/egl.xml --extensions extensions/gl
+	$(PYTHON) $(BIN)/parse_xml.py EGL-Registry/api/egl.xml --api egl --extensions extensions/gl
+	@echo "--------------------------------------------------------------------"
+	@echo "filter descriptors"
+	@echo "--------------------------------------------------------------------"
+	$(BIN)/filter_gl_ext.sh $(EXT)
 ifeq ($(patsubst Darwin%,Darwin,$(SYSTEM)), Darwin)
 	find $(CORE) -maxdepth 1 -type f | grep -v VERSION | grep -v "~" | \
 	xargs -J % cp % $(EXT)
diff --git a/auto/bin/parse_xml.py b/auto/bin/parse_xml.py
index 1340deb..daa1449 100755
--- a/auto/bin/parse_xml.py
+++ b/auto/bin/parse_xml.py
@@ -1,9 +1,13 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 import re
 import sys
 from xml.dom.minidom import parse, Node
 
+#
+# DOM traversal utility functions
+#
+
 def findChildren(node, path):
     result = []
     if len(path)==1:
@@ -21,7 +25,9 @@ def findChildren(node, path):
 def findData(node, path):
     return [ i.firstChild.data for i in findChildren(node, path) ]
 
-def findParams(node):
+isPointer = re.compile('(.*)([ ]+)([*]+)')
+
+def findParams(node, typeMap = {}):
     n = findData(node, ['name'])[0]
     t = ''
     for i in node.childNodes:
@@ -29,7 +35,14 @@ def findParams(node):
             t += i.data
         if i.nodeType==Node.ELEMENT_NODE and i.tagName=='ptype':
             t += i.firstChild.data
-    return ( t, n)
+
+    t.strip()
+    m = isPointer.match(t)
+    if m:
+        t = ('%s%s'%(m.group(1), m.group(3))).strip()
+    if t in typeMap:
+        t = typeMap[t]
+    return ( t, n.strip())
 
 def findEnums(dom):
     ret = {}
@@ -39,11 +52,11 @@ def findEnums(dom):
       ret[n] = v
     return ret
 
-def findCommands(dom):
+def findCommands(dom, typeMap = {}):
     ret = {}
     for i in findChildren(dom, [ 'registry', 'commands', 'command' ]):
-      r,n = findParams(findChildren(i, ['proto'])[0])
-      p = [ findParams(j) for j in findChildren(i, ['param'])]
+      r,n = findParams(findChildren(i, ['proto'])[0], typeMap)
+      p = [ findParams(j, typeMap) for j in findChildren(i, ['param'])]
       ret[n] = (r, p)
     return ret
 
@@ -74,29 +87,48 @@ def findExtensions(dom):
     return ret
 
 def findApi(dom, name):
+    typeMap = {}
+#    if name=='wgl':
+#        typeMap = { 'int' : 'INT', 'void' : 'VOID' }
     enums      = findEnums(dom)
-    commands   = findCommands(dom)
+    commands   = findCommands(dom, typeMap)
     features   = findFeatures(dom)
     extensions = findExtensions(dom)
     return (enums, commands, features, extensions)
 
+#
+#
+#
+
+isWGL = re.compile('WGL_([A-Z0-9]+)_.*')
+
 def writeExtension(f, name, extension, enums, commands):
     f.write('%s\n'%name)
-    f.write('%s\n'%'https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf')
+
+    url = 'https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf'
+
+    m = isWGL.match(name)
+    if m:
+        url = 'https://www.khronos.org/registry/OpenGL/extensions/%s/%s.txt'%(m.group(1), name)
+
+    f.write('%s\n'%(url))
+
     if name.find('_VERSION_')==-1:
         f.write('%s\n'%name)
     else:
         f.write('\n')
     f.write('\n')
+
     enums = [ (j, enums[j]) for j in extension[0] ]
     for e in sorted(enums, key=lambda i: i[1]):
         f.write('\t%s %s\n'%(e[0], e[1]))
+
     commands = [ (j, commands[j]) for j in extension[1] ]
     for c in sorted(commands):
-        params = ', '.join( [ '%s %s'%(j[0], j[1]) for j in c[1][1] ] )
+        params = ', '.join( [ '%s %s'%(j[0].strip(), j[1].strip()) for j in c[1][1] ] )
         if len(params)==0:
-            params = ' void '
-        f.write('\t%s %s (%s)\n'%(c[1][0], c[0], params))
+            params = 'void'
+        f.write('\t%s %s (%s)\n'%(c[1][0].strip(), c[0].strip(), params))
 
 if __name__ == '__main__':
 
@@ -105,6 +137,7 @@ if __name__ == '__main__':
 
   parser = OptionParser('usage: %prog [options] [XML specs...]')
   parser.add_option("--core", dest="core", help="location for core outputs", default='')
+  parser.add_option("--api", dest="name", help="API name: egl, wgl, glx, etc", default='')
   parser.add_option("--extensions", dest="extensions", help="location for extensions outputs", default='')
 
   (options, args) = parser.parse_args()
@@ -112,7 +145,7 @@ if __name__ == '__main__':
   for i in args:
 
     dom = parse(i)
-    api = findApi(dom, 'egl')
+    api = findApi(dom, options.name)
 
     print('Found {} enums, {} commands, {} features and {} extensions.'.format(
         len(api[0]), len(api[1]), len(api[2]), len(api[3])))
diff --git a/auto/core/gl/WGL_ARB_create_context b/auto/core/gl/WGL_ARB_create_context
index 7e7c163..b617481 100644
--- a/auto/core/gl/WGL_ARB_create_context
+++ b/auto/core/gl/WGL_ARB_create_context
@@ -9,5 +9,4 @@ WGL_ARB_create_context
 	WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
 	WGL_CONTEXT_FLAGS_ARB 0x2094
 	ERROR_INVALID_VERSION_ARB 0x2095
-	ERROR_INVALID_PROFILE_ARB 0x2096
 	HGLRC wglCreateContextAttribsARB (HDC hDC, HGLRC hShareContext, const int* attribList)