Cleanup, split out opc module, added license etc

2 files changed, 352 insertions, 337 deletions

diff --git a/examples/ooxml-strict/dumpsample.py b/examples/ooxml-strict/dumpsample.py
index 87f9b88..36b5fc4 100644
--- a/examples/ooxml-strict/dumpsample.py
+++ b/examples/ooxml-strict/dumpsample.py
@@ -1,348 +1,47 @@
+# Copyright 2010, Thorsten Behrens, Novell Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain a
+# copy of the License at:
+#
+#            http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import re
 import sys
-import xml.sax
-import pyxb.utils.domutils as domutils
-import pyxb.utils.saxdom
+import StringIO
+
 import pyxb.binding.saxer
-import re
 
+import opc
 import dml.dml
 import pml.pml
 import props.props
 import sml.sml
 import wml.wml
 
-import os
-import zipfile
-import StringIO
-from exceptions import TypeError
-import xml.etree.ElementTree as ElemTree
-
-# 3-tuples of media type, root schema uri, and relationship type uri
-# (contains all xml-ish file types of ooxml)
-xml_type_map = [
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.comments+xml",
-			  "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-			  "http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.settings+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/settings"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.endnotes+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/endnotes"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.fontTable+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/fontTable"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.footer+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/footer"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.footnotes+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/footnotes"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.document.glossary+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/glossaryDocument"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.header+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/header"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.numbering+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/numbering"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.styles+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles"),
-
-             ("application/vnd.openxmlformats-officedocument.wordprocessingml.webSettings+xml",
-              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/webSettings"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.calcChain+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/calcChain"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.chartsheet+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/chartsheet"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.comments+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.connections+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/connections"),
-
-             ("application/xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/xmlMaps"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.dialogsheet+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/dialogsheet"),
-
-             ("application/vnd.openxmlformats-officedocument.drawing+xml",
-              "http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/drawing"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.externalLink+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/externalLink"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.sheetMetadata+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/sheetMetadata"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.pivotTable+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/pivotTable"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.pivotCacheDefinition+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/pivotCacheDefinition"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.pivotCacheRecords+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.queryTable+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/queryTable"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.revisionHeaders+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/revisionHeaders"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.revisionLog+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/revisionLog"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.userNames+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/usernames"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.tableSingleCells+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/tableSingleCells"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/mains",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.table+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/table"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.volatileDependencies+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/volatileDependencies"),
-
-             ("application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml",
-              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.commentAuthors+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/commentAuthors"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.comments+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.handoutMaster+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/handoutMaster"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.notesMaster+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/notesMaster"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.notesSlide+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/notesSlide"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.presentation.main+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.presProps+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/presProps"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.slide+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideLayout"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.slideMaster+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideMaster"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.slideUpdateInfo+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideUpdateInfo"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.viewProps+xml",
-              "http://schemas.openxmlformats.org/presentationml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/viewProps"),
-
-             ("application/vnd.openxmlformats-officedocument.drawingml.chart+xml",
-              "http://schemas.openxmlformats.org/drawingml/2006/chart",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/chart"),
-
-             ("application/vnd.openxmlformats-officedocument.drawingml.chartshapes+xml",
-              "http://schemas.openxmlformats.org/drawingml/2006/chart",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/chartUserShapes"),
-
-             ("application/vnd.openxmlformats-officedocument.drawingml.diagramColors+xml",
-              "http://schemas.openxmlformats.org/drawingml/2006/diagram",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/diagramColors"),
-
-             ("application/vnd.openxmlformats-officedocument.drawingml.diagramData+xml",
-              "http://schemas.openxmlformats.org/drawingml/2006/diagram",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/diagramData"),
-
-             ("application/vnd.openxmlformats-officedocument.drawingml.diagramLayout+xml",
-              "http://schemas.openxmlformats.org/drawingml/2006/diagram",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/diagramLayout"),
-
-             ("application/vnd.openxmlformats-officedocument.drawingml.diagramStyle+xml",
-              "http://schemas.openxmlformats.org/drawingml/2006/diagram",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/diagramQuickStyle"),
-
-             ("application/vnd.openxmlformats-officedocument.theme+xml",
-              "http://schemas.openxmlformats.org/drawingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme"),
-
-             ("application/vnd.openxmlformats-officedocument.themeOverride+xml",
-              "http://schemas.openxmlformats.org/drawingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/themeOverride"),
-
-             ("application/vnd.openxmlformats-officedocument.presentationml.tableStyles+xml",
-              "http://schemas.openxmlformats.org/drawingml/2006/main",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/tableStyles"),
-
-             ("application/xml",
-              "http://schemas.openxmlformats.org/officeDocument/2006/additionalCharacteristics",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/customXml"),
-
-             ("application/xml",
-              "http://schemas.openxmlformats.org/officeDocument/2006/bibliography",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/customXml"),
-
-             ("application/vnd.openxmlformats-officedocument.customXmlProperties+xml",
-              "http://schemas.openxmlformats.org/officeDocument/2006/customXmlDataProps",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/customXmlProps"),
-
-             ("application/vnd.openxmlformats-package.digital-signature-xmlsignature+xml",
-              "http://schemas.openxmlformats.org/package/2006/digital-signature",
-              "http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/signature"),
-
-# no schema
-#              ("application/vnd.openxmlformats-package.core-properties+xml",
-#               "http://schemas.openxmlformats.org/package/2006/metadata/core-properties",
-#               "http://schemas.openxmlformats.org/officedocument/2006/relationships/metadata/core-properties"),
-
-             ("application/vnd.openxmlformats-officedocument.custom-properties+xml",
-              "http://schemas.openxmlformats.org/officeDocument/2006/custom-properties",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/custom-properties"),
-
-             ("application/vnd.openxmlformats-officedocument.extended-properties+xml",
-              "http://schemas.openxmlformats.org/officeDocument/2006/extended-properties",
-              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties")
-]
-
-def createContentTypeMap (xml):
-    defaultMap={}
-    overrideMap={}
-    tree = ElemTree.XML(xml)
-    ns=lambda s: "{http://schemas.openxmlformats.org/package/2006/content-types}"+s
-    for elem in tree.findall(ns("Default")):
-        defaultMap[elem.get("Extension")] = elem.get("ContentType")
-    for elem in tree.findall(ns("Override")):
-        overrideMap[elem.get("PartName")] = elem.get("ContentType")
-    return (defaultMap, overrideMap)
-
-def validateType (content_types, path, type_str):
-    extension = os.path.splitext(path)[1]
-    if isinstance(type_str,str):
-        comp = lambda s,pat: s != pat
-    else:
-        # assume regular expression
-        comp = lambda s,pat: re.match(pat,s) != None
-        
-    if path in content_types[1]:
-        if comp(content_types[1][path], type_str):
-            raise TypeError("Wrong content type for %s" % path)
-    elif extension in content_types[0]:
-        if comp(content_types[0][extension], type_str):
-            raise TypeError("Wrong content type for %s" % path)
-
-def findContentType (content_types, path):
-    extension = os.path.splitext(path)[1]
-    if path in content_types[1]:
-        return content_types[1][path]
-    elif extension in content_types[0]:
-        return content_types[0][extension]
-
-def readFragment (package, content_types, path, type_str):
-    validateType(content_types, path, type_str)
-    return ElemTree.XML(package.read(path))
-
-def readFragmentIfXml (package, content_types, path, type_map):
-    media_type = findContentType(content_types, "/"+path)
-    print "media type for fragment %s is %s" % (fragment, media_type)
-    for elem in type_map:
-        if elem[0] == media_type:
-            print "matching media type found, schema root is %s, relationship type uri is %s" % (elem[1], elem[2])
-            saxer = pyxb.binding.saxer.make_parser(location_base=path)
-            handler = saxer.getContentHandler()
-            handler.__trace = True
-            saxer.parse(StringIO.StringIO(package.read(path)))
-            sax_instance = handler.rootObject()
-
-            for i in sax_instance.iterateBinding([re.compile('.*CT_R'), re.compile('.*rsidR.*')]):
-                i()
-                print sax_instance.toxml()
-                print
-                i()
-                print sax_instance.toxml()
-                print
-                i()
-                print sax_instance.toxml()
-                print
-
-    return None
 
 if len(sys.argv) > 1:
-    package = zipfile.ZipFile(sys.argv[1])
-
-    # populate media type maps
-    (defaultMap,overrideMap) = createContentTypeMap(
-        package.read("[Content_Types].xml"))
-
-    # scan all contained files, load those matching one of xml_type_map's
-    # xml media types
-    for fragment in package.namelist():
-        readFragmentIfXml(package,
-                          (defaultMap,overrideMap),
-                          fragment,
-                          xml_type_map)
+    package = opc.OPCPackage(sys.argv[1])
+
+    for fragment in package.files():
+        saxer = pyxb.binding.saxer.make_parser(location_base=fragment)
+        handler = saxer.getContentHandler()
+        saxer.parse(StringIO.StringIO(package.read(fragment)))
+        sax_instance = handler.rootObject()
+
+        for i in sax_instance.iterateBinding([re.compile('.*CT_R'), re.compile('.*rsidR.*')]):
+            i()
+            print sax_instance.toxml()
+            print
+            i()
+            print sax_instance.toxml()
+            print
+            i()
+            print sax_instance.toxml()
+            print
diff --git a/examples/ooxml-strict/opc.py b/examples/ooxml-strict/opc.py
new file mode 100644
index 0000000..ba96ffa
--- /dev/null
+++ b/examples/ooxml-strict/opc.py
@@ -0,0 +1,316 @@
+# Copyright 2010, Thorsten Behrens, Novell Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain a
+# copy of the License at:
+#
+#            http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import sys
+import os
+import zipfile
+import xml.sax
+import xml.etree.ElementTree as ElemTree
+
+# 3-tuples of media type, root schema uri, and relationship type uri
+# (contains all xml-ish file types of ooxml)
+xml_type_map = [
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.comments+xml",
+			  "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+			  "http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.settings+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/settings"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.endnotes+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/endnotes"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.fontTable+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/fontTable"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.footer+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/footer"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.footnotes+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/footnotes"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.document.glossary+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/glossaryDocument"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.header+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/header"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.numbering+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/numbering"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.styles+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles"),
+
+             ("application/vnd.openxmlformats-officedocument.wordprocessingml.webSettings+xml",
+              "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/webSettings"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.calcChain+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/calcChain"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.chartsheet+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/chartsheet"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.comments+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.connections+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/connections"),
+
+             ("application/xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/xmlMaps"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.dialogsheet+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/dialogsheet"),
+
+             ("application/vnd.openxmlformats-officedocument.drawing+xml",
+              "http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/drawing"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.externalLink+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/externalLink"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.sheetMetadata+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/sheetMetadata"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.pivotTable+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/pivotTable"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.pivotCacheDefinition+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/pivotCacheDefinition"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.pivotCacheRecords+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.queryTable+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/queryTable"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.revisionHeaders+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/revisionHeaders"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.revisionLog+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/revisionLog"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.userNames+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/usernames"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.tableSingleCells+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/tableSingleCells"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/mains",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.table+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/table"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.volatileDependencies+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/volatileDependencies"),
+
+             ("application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml",
+              "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.commentAuthors+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/commentAuthors"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.comments+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.handoutMaster+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/handoutMaster"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.notesMaster+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/notesMaster"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.notesSlide+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/notesSlide"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.presentation.main+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.presProps+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/presProps"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.slide+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideLayout"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.slideMaster+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideMaster"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.slideUpdateInfo+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideUpdateInfo"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.viewProps+xml",
+              "http://schemas.openxmlformats.org/presentationml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/viewProps"),
+
+             ("application/vnd.openxmlformats-officedocument.drawingml.chart+xml",
+              "http://schemas.openxmlformats.org/drawingml/2006/chart",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/chart"),
+
+             ("application/vnd.openxmlformats-officedocument.drawingml.chartshapes+xml",
+              "http://schemas.openxmlformats.org/drawingml/2006/chart",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/chartUserShapes"),
+
+             ("application/vnd.openxmlformats-officedocument.drawingml.diagramColors+xml",
+              "http://schemas.openxmlformats.org/drawingml/2006/diagram",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/diagramColors"),
+
+             ("application/vnd.openxmlformats-officedocument.drawingml.diagramData+xml",
+              "http://schemas.openxmlformats.org/drawingml/2006/diagram",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/diagramData"),
+
+             ("application/vnd.openxmlformats-officedocument.drawingml.diagramLayout+xml",
+              "http://schemas.openxmlformats.org/drawingml/2006/diagram",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/diagramLayout"),
+
+             ("application/vnd.openxmlformats-officedocument.drawingml.diagramStyle+xml",
+              "http://schemas.openxmlformats.org/drawingml/2006/diagram",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/diagramQuickStyle"),
+
+             ("application/vnd.openxmlformats-officedocument.theme+xml",
+              "http://schemas.openxmlformats.org/drawingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme"),
+
+             ("application/vnd.openxmlformats-officedocument.themeOverride+xml",
+              "http://schemas.openxmlformats.org/drawingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/themeOverride"),
+
+             ("application/vnd.openxmlformats-officedocument.presentationml.tableStyles+xml",
+              "http://schemas.openxmlformats.org/drawingml/2006/main",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/tableStyles"),
+
+             ("application/xml",
+              "http://schemas.openxmlformats.org/officeDocument/2006/additionalCharacteristics",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/customXml"),
+
+             ("application/xml",
+              "http://schemas.openxmlformats.org/officeDocument/2006/bibliography",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/customXml"),
+
+             ("application/vnd.openxmlformats-officedocument.customXmlProperties+xml",
+              "http://schemas.openxmlformats.org/officeDocument/2006/customXmlDataProps",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/customXmlProps"),
+
+             ("application/vnd.openxmlformats-package.digital-signature-xmlsignature+xml",
+              "http://schemas.openxmlformats.org/package/2006/digital-signature",
+              "http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/signature"),
+
+             ("application/vnd.openxmlformats-officedocument.custom-properties+xml",
+              "http://schemas.openxmlformats.org/officeDocument/2006/custom-properties",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/custom-properties"),
+
+             ("application/vnd.openxmlformats-officedocument.extended-properties+xml",
+              "http://schemas.openxmlformats.org/officeDocument/2006/extended-properties",
+              "http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties")
+]
+
+def createContentTypeMap (xml):
+    defaultMap={}
+    overrideMap={}
+    tree = ElemTree.XML(xml)
+    ns=lambda s: "{http://schemas.openxmlformats.org/package/2006/content-types}"+s
+    for elem in tree.findall(ns("Default")):
+        defaultMap[elem.get("Extension")] = elem.get("ContentType")
+    for elem in tree.findall(ns("Override")):
+        overrideMap[elem.get("PartName")] = elem.get("ContentType")
+    return (defaultMap, overrideMap)
+
+class OPCPackage (zipfile.ZipFile):
+    """Specialization of ZipFile for operating on OPC packages.
+
+    Class provides high-level functionality like <<give me all xml files of a
+    certain mimetype>>, and makes sure the OPC packaging constraints are
+    maintained.
+    """
+    def __init__ (self, file, mode="r"):
+        zipfile.ZipFile.__init__(self, file, mode)
+        self.defaultMap, self.overrideMap = createContentTypeMap(
+            self.read("[Content_Types].xml"))
+        
+    def _findContentType (self, path):
+        """Lookup path in content type map, return mediatype"""
+        extension = os.path.splitext(path)[1]
+        if path in self.overrideMap:
+            return self.overrideMap[path]
+        elif extension in self.defaultMap:
+            return self.defaultMap[extension]
+
+    def files (self, mimetypes=None):
+        """Iterator subsequently returning all files from the package,
+        that match the given list of mimetypes."""
+
+        if mimetypes is None:
+            mimetypes = xml_type_map
+        else:    
+            mimetypes = [(i,"http://dummyschema/","http://dummyrelation/") for i in mimetype]
+            
+        # scan all contained files, yield those matching one of
+        # xml_type_map's xml media types
+        for fragment in self.namelist():
+            mimetype = self._findContentType("/"+fragment)
+            if not mimetype is None:
+                for elem in mimetypes:
+                    if elem[0] == mimetype:
+                        yield fragment