I'm not sure if this is the right group for this question.
But, here it goes.
I've modeled a xslt translation from a trivial
xml syntax to postgres. One of the problems I've
run in to is the database column belongs to a table, e.g.:
<table name="test">
<column name="col1" type="int" size="5" minvalue="50" maxvalue="10000"/>
<column name="col2" type="text" size="50" notnull="true"/>
</table>
etc..
however, in databaseland, the column is often a domain descended
from another tree. For example, the column could be 'studentid' and
that student
id could be used in many different tables because it is a foreign key.
So, in my source xml, I've introduced
<default>
<column name="col1" type="int" .../>
...
and I changed the table xml to:
<table name="test">
<column inherit="col1" minvalue="60" />
So, I translate this, but, it sure would be nice
if I could inherit the attributes and nodes of the default column
name and override what I want locally. Does such a
construct exist either on xsl side or xml side?
I did some google searches on inheritance/subtyping and
there seem to be pretty strong opinions about the subject.
Worst case I can do a pre-pass on the xml text and use a heredoc
to expand this sort of thing. Any ideas would be welcome!
Thanks,
---greg
--
Greg Fausak
greg(_at_)thursday(_dot_)com
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