Add a README file

Author: romjerome

lxml/README.md

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+# Some experimentations around Gramps XML and data handling
+
+##'etreeGramplet' as set of built-in python module.
+Very basic (quick and dirty), but should run whatever plateform and any pure python standard ecosystem (built-in modules). Designed as a gramps addon.
+
+##'lxmlGramplet' needs 'lxml' module.
+More powerful and more complex. Designed as a gramps addon.
+Many experimentations. Will generate some files from a Gramps XML.
+'''Gramps XML -to-> data''' 
+
+Some samples of validations and transformations.
+Methods and code might be old dated, but it is still fast and does the job.
+
+See also https://gramps-project.org/wiki/index.php/Lxml_Gramplet
+
+##'grampsxml.dtd', 'grampsxml.rng', 'grampsxml.xsd'
+related to validations via 'lxmlGramplet'
+
+##'lxml.css', 'query_html.xsl'
+basic templates for displaying transformed data via 'lxmlGramplet'
+'''data -to-> Gramps XML'''
+
+##'superclasses.py', 'subclasses.py'
+modules generated with generateDS (Dave Kuhlman)
+Did not use as production, rather an advanced documentation
+
+##'xpaths_x_x_x.txt'
+For XPath addict.
+Can be used for parsing and handling tags and namespaces for most Gramps XML file versions.
+An alternate documentation