This directory contains the releases of the 
generated results of the SimDB data model, especially those that are part of the normative specs.
This is supposed to provide a relatively stable location that can be used to link to for example.
Eventually the IVOA will be the official host of any specifications resulting 
from this effort. The releases deemed useful will be put here and labelled by 
the latest SVN version label of the input data model (in /input/SimDB_DM.xml)
or the XSLT scripts in /res.
the version in latest is simply the latest that we have released

The structure of the directories holding the various versions is as follows
(using the code generated based on the latest SVN version (780) of model 
and/or the XSLT scripts in res/). When a new latest version is released:

latest/
  thisversion:
    An file containing the SVN version number corresponding to this latest "released" version. 
  SimDB_DM_INTERMEDIATE.xml: 
     the version of the intermediate representation of the model,
     generated using simdb/res/xmi2intermediate.xsl corresponding to SVN release 780. 
  ddl/
    mssqlserver/
      SimDB_createTables.sql:
        A Microsoft SQLServer compatible SQL script defining tables for storing 
        instances of the SimDB data model according to the OR mapping implemented
        in simdb/res/intermediate2ddl.xsl. 
        The schema defined by these tables is in general NOT the same as that
        defined by the TAP specification. In particular the mapping of inheritance
        hierarchies will likely be different from that implied by the TAP interface.
        The schema contains primary key, index and foreign key definitions.
      SimDB_createViews.sql:
        A Microsoft SQLServer compatible SQL script defining views in terms of
        the tables defined in SimDB_createTables.sql. These views give 1-1 representations
        of each of the classes defined in the UML model, including all the attributes and
        references etc inherited from all base classes.
        The schema defined by these views equivalent to the schema defined by the TAP specification.
      SimDB_dropTables.sql:
        Script for dropping the tables defined SimDB_createTables.sql.
        Does so in the correct order for foreign key constraints to be honoured.
      SimDB_dropView.sql:
        Script for dropping the views defined SimDB_createTables.sql.
        Does so in correct order, as some views depend on other views.
    postgres/
      Same structure as ddl/mssqlserver/, but with Postgres compatible scripts.
  html/
    SimDB.html: 
      The official human readable documentation of the data model.
      Generated using /res/intermediate2html.xsl.
  tap/
    SimDB_vodataservice.xml:
      VODataservice-like representation of the TAP interface to the SimDB
    SimDB_tap_tableset:
      VOTable-like representation of the TAP interface to the SimDB. 
      Contains TABLE and FIELD definitions for all publicly accessible tables.
    mssqlserver/
      SimDB_tap_schema.sql:
        A Microsoft SQLServer compatible SQL script for creating tables storing
        the TAP metadata as relational tables.
        Defines the tables and fills them with the metadata for the TAP tables. 
    postgres/
      Same structure as tap/mssqlserver/, but with Postgres compatible scripts.
  xsd/
    Files representing the mapping from the UML model to XML Schema, generated according 
    to the /res/intermediate2xsd.xsl script.