Ive been a SQL DBA for a while now and Im considering trying pick up some Data Architect/ Modeler skills to go along with it. Ive always been somewhat in the mix of designing DB's, say simply to 3nf. But after reading several posts here and looking at several Data Architect/ Modeler job descriptions, Im starting to realize it goes much deeper than that.

Can anyone recommend any of the (non vendor specific ) Data Architect/ Modeler certifications that are out there? I'd like for it to include both OLTP and OLAP design. What I really care about is that the study material will teach me real world stuff, not just give me the answers.