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                      MAPPING A MODEL ON COMPLEX TIMESERIES
                      
    This a proposal for a mapping syntax allowing generalist clients to understand time series VOTables.
    This work is based on the VOMDL group proposal.
    The primary gloal is to test a mapping syntax, not the models. 
    The SimpleTS model used is not the latest one.

	Details on this approach can be found here https://github.com/lmichel/vodml-lite-mapping      

    Laurent Michel 10/2018
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SOME STRENGTHS

* Mapping separation:
  * Allow to annotae VOTABLEs withouth touching their content
  * Make easier the processing of data spread over different tables
  * Allows to serve the mapping by an specific service
  * Human readable as long as the syntax is simple
  * The syntax denotes the model structure which allows to reconstruct complex hierarchies  

DATA SAMPLE

* gaia.multiband.xml:
  * Time Series provided by ESAC.
  * Contains one TS instance with 3 light curves (SparseCubes)
  * Photometric points of the 3 bands are all in the same table 
  * Reconstructing the 3 light curves implies that the mapping must be able to group data by filter 

MAPPING BASELINES

* VODML features
  * The mapping is packed in a VODML block just below <VOTABLE>
  * There is one mapping component for each table
  * Globals instances are in the GLOBALS block
  
* But
  * The mapping syntax is limited to what the parser needs. Extra information can be retrieved in the modle itself
  * All components are idenfied by their dmroles (defined in the model) and dmtypes
  
* We assume there is one root class for the model; the class to be instanciated
  * The root class has dmrole="root"
  
To get more, please see https://github.com/lmichel/vodml-lite-mapping