Following are helpful Regular Expression links

• Regular Expression HOWTO for Python
• Regular Expression Basic Syntax Reference
• Wikipedia: Regular Expression

I am currently using Pylint to check for bugs and formatting errors in my Python scripts. I used Brandon Corfman's nice Komodo Hacks: Integrating Pylint tutorial to set up Pylint and how to integrate it with the Komodo Edit IDE (see Easy setup of a Python 2.5 development environment on Windows about setting up Python).

Here is my updated Pylint execution macro for Komodo Edit 5 which includes a verbose and an errors only reporting command.

This post describes a series of Python scripts to convert FGDC XML metadata for WMS and WFS services to ISO 19139 service metadata via GeoNetwork's OGC harvest service. Here are the steps:

1. Extract WMS and WFS GetCapabilities URLs from FGDC XML metadata and write them to a file.
2. Create a GeoNetwork Harvest Node from extracted GetCapabilities URLs and let GeoNetwork's OGC WMS/WFS harvester create ISO 19139 metadata from GetCapabilities response. Note: the resulting ISO 19139 metadata is only as good as the one in the GetCapabilities response. In addition, GetCapabilities responses do not include all fields necessary for minimum ISO 19139 metadata.
3. Copy some FGDC metadata entries (Title, Abstract, etc.) to newly created ISO 19139 metadata.

Our goal is to have working WMS and WFS metadata records in our CSW catalog that can be used to add the described services to analytical software such as ESRI's C-SW Client for ArcGIS Desktop. Following are the reasons why I am currently choosing this convoluted process instead of a direct FGDC to ISO 19139 metadata conversion:

Files: 

gn_hn_create_OGC_list.py_.txt

Files: 

gn_hn_create_OGC_harvestnode.py_.txt

This is an example script on how to do XSLT transformations in Python 2.6 through the Gnome libxml XML C parser and toolkit. The relative fast C library is available on multiple platforms but you will also need Python bindings for libxml2 and libxslt. There is a handy libxml2 and libxslt Python bindings installer for Windows which also includes the C libraries in DLL form.

Files: 

libxml_xslt_transform_example.py_.txt

This is a Python example script for importing GeoNetwork Metadata Exchange Format 1.1 (MEF) archives to GeoNetwork 2.4.2's mef.import service. The mef.import service requires a multipart/form-data POST through a modified MultipartPostHandler.py library which now supports Unicode (urllib2). It has been tested in Windows XP and Python 2.6.

Files: 

gn_mef2mef.import_example.py_.txt

Files: 

MultipartPostHandler.py_.txt

This is an example Python script that showcases the creation of GeoNetwork Metadata Exchange Format 1.1 (MEF) archives from ISO 19139 metadata XML files.It has been tested in Windows XP and Python 2.6.

Files: 

gn_iso19139_to_mef_example.py_.txt

 This is an example Python script that showcases GeoNetwork authentication, session handling, and CSW transactions. 

Files: 

gn_csw_transaction_example.py_.txt

Tested with deegree-csw 2.3pre
Read the XSLT file for more information.

Attached is an example XSLT1 script to transform a WMS GetCapabilities 1.1.1 response to a CSW Insert transaction. The script is based on deegree's wms2iso19119.xsl (http://www.deegree.org/).
Note that currently it only supports WMS version 1.1.1 (<WMT_MS_Capabilities>) responses because it chokes on 1.3.0 (<WMS_Capabilities>) responses.

Files: 

etl_wms2csw_v3.py_.txt

Files: 

wms2iso19119_insert_XSLT1_07.xsl

Files: 

wms_getcapabilities_url.txt