[GRASS-dev] Metadata GRASS (GSOC)

[Matej Krejci]

Hi,

I would like to discuss the metadata management in GRASS which is my topic
for GSOC.

My idea for GSOC term is to Python library, command line modules and wxGUI
front-end.

The current plan has two parts, however the second one is optional.

1)
Main task is to make Python library that can create, read and edit XML (ISO
standard). I think it is necessary to implement standards externally. In
this case it is useful to use XSD (xml template) to generate the valid XML.
There is an option to use generateDS[1] to generates Python code with
classes representing XSD structure. Also the generateDS can fill XSD  and
then export it to XML.
In this case the module will read raster and vector metadata from current
GRASS flat files. In the future(GRASS 8 development) a new C lib can be
created. It would enable to fill in fundamental XML with values from
GRASS(v, r, r3d) and other values by "default values" that can be replaced
by this module. This C library will be just for fill in basic XML and any
control (edit,read,etc) will be provide by Python module (GSOC). What you
think about generateDS?

2)
If theres some time left in GSOC term or after I would like to implement a
server-client management of metadata using pycsw [3](server side) and
owslib[3] in client side. Demonstration of functions that provide this
solution is i.e. in QGIS plugin (Meta Search).  I  wanted to use this
suggestion at first, but there are quite heavy dependences on others
packages. In addition there is no any package for debian... So this
solution will be for a user who really want to work with metadata but not
fundamental ones.


[1]http://www.rexx.com/~dkuhlman/generateDS.html
[2]http://pycsw.org/
[3]http://geopython.github.io/OWSLib/
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