Subject: RE: [xsl] xml inheritance / xslt inheritance application From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Tue, 17 Jun 2008 20:49:11 +0100 |
Assuming XSLT 2.0, with a global variable $default set to the <default> element, and <column> as the context node, you can access an attribute such as "type" using (@type, $default/column[@name=current()/@name]@type)[1] which might help. If the construct occurs often enough you can wrap it in a function. Michael Kay http://www.saxonica.com/ > -----Original Message----- > From: Greg Fausak [mailto:lgfausak@xxxxxxxxx] > Sent: 17 June 2008 20:22 > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: [xsl] xml inheritance / xslt inheritance application > > 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@xxxxxxxxxxxx
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