Issue 142: Allow embedded discriminator column

[Craig L Russell <Cr...@Sun.COM>]

Javadogs,

Currently, there is no standard way to describe the mapping of  
embedded instances that use a discriminator column.

Issue 142
H
Allow embedded discriminator column

This proposal adds the discriminator element to the embedded element  
for both .jdo and .orm mappings.

<!ELEMENT embedded (extension*, discriminator?, (field|property)*,  
extension*)>

Craig Russell
Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
408 276-5638 mailto:Craig.Russell@sun.com
P.S. A good JDO? O, Gasp!

Re: Issue 142: Allow embedded discriminator column

[Abe White <aw...@bea.com>]

> Currently, there is no standard way to describe the mapping of  
> embedded instances that use a discriminator column.


There is no good way to support inheritance of embedded objects.  I  
vote against the spec trying to shoehorn something in.  Let vendors  
who want to support it come up with their own solutions.