Time instant/epoch

[lmichel]

• New datatype (Epoch(representation, value) for the timestamps
• No more PhotometricProperty abstract class

[loumir]

The update of the 2 diagrams sounds good me.

[loumir]

in the documentation generated for EPOCH type , the description strings are missing .

<dataType>
     <vodml-id>Epoch</vodml-id>
     <name>Epoch</name>
     <description>
           TODO : Missing description : please, update your UML model asap.   etc.... 

[lmichel]

The VODML with descriptions is in vo-dml.
Description elements are edited in specific files

/desc.mango.vo-dml.xml

[loumir]

found on typo in /desc.mango.vo-dml.xml
on line 114 : "usually an instance of \texttt{mango:EpcohPosition}."
sourd be "usually an instance of \texttt{mango:EpochPosition}."

[lmichel]

The PR branch has been updated taking the comment into account and Epoch data type has been renamed as DateTime and EpochPosition.epoch renamed as EpochPosition.obsDate

[loumir]

difficult to interpret the change here . I suppose it is OK .

[loumir]

not clear in this diagram wether DateTime (with representation) is a class ( greenBlue) or a type (light yellow)

[loumir]

I approve these changes . This clarifies Time related information in the EpochPosition Class as presented in issue #85