(r3) IVOATheorySimDB_Check < IVOA

IVOA Web>IvoaTheory>IVOATheorySimDB>IVOATheorySimDB_Check (revision 3) (raw view)~~EditAttach~~

Tables contain points that have been discussed during the !SimDB project (including preceding SNAP part).

Approach to !SimDB
|Item|OK|NOT OK|Comment|
| SNAP follows SSA:data model + protocol| | | (Victoria interop, 2006) |
|!SimDB requires registry-like approach|||Discussed in April 2007 SNAP meeting of core participants (up till then), Garching|
|SNAP->!SimDB+!SimDAP  | | |formally announced in 2008 Trieste interop, agreed by "tiger team" before |
|!SimDB is a protocol for finding interesting simulation and postprocessing experiments and their results | | | |
|!SimDB implements "queryData" part of "simple" DAL protocols | | | |
|"getData" part is implemented by !SimDAP or custom services| | | |
| | | | |
| | | | |

!SimDB data modelling methodology
|Item|OK|NOT OK|Comment|
|!SimDB/DM represented in UML class diagram | | | UML aspect follows decision in Cambridge interop 2003. Class diagram seems obvious (?)|
|!SimDB/UML is self documenting | | | All entities and classes must be properly documented. !SimDB/Note gives background and context, UML model is in principle sufficient. This was decision of core designers (GL, RW, LB), presented in 2008 Trieste Interop|
|!SimDB/DM's UML stored as XMI document (ASCII) | | | XMI is standard XML format for representing UML documents. |
|!SimDB uses !MagicDraw Community Edition 12.1 for the XMI | | | Freely available tool, ESO has commercial version. Should not be necessary to specify a tool, as XMI should deal with that, but in practice useful to "insist" on one |
|!SimDB/DM uses a predefined UML profile | | | Aimed to simplify models and promote interoperability by presenting uniform DM langugage fo the IVOA. Restriction + extension of UML, currently informal (Appendix in Note) + formal (a UML2 profile generated by ESO, updated in course of design).  |
|Propose an intermediate XML format for representing DMs following profile. | | | In practice very useful. Very much more readable than XMI. in principle hand-editable. Core of VO-URP TAP/XSD/HTML/UTYPE/Java/DDL/... generation.|
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!SimDB/DM contents
|Item|OK|NOT OK|Comment|
| | | | |
|"getData" services can be foud in !SimDB | | | |
| | | | |

!SimDB/TAP
|Item|OK|NOT OK|Comment|
| | | | |
|!SimDB is a TAP service| | | first discussed April 2007 Garching|
|!SimDB's TAP_SCHEMA predefined | | | Allows for integration: same ADQL can be sent to all SimDB services.|
|!SimDB/TAP_SCHEMA derived from !SimDB/DM using predefined OR-mapping rules| | | |
|!SimDB/TAP's OR mapping rules uses | | | |
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Topic revision: r3 - 2009-04-30 - GerardLemson

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