new to xml

hiya everybody!
I want to get certified in xml but I don't know squat about xml. Is the IBM 141 cert the only cert out there for xml? It seems like that or that is the best cert to take for xml.
I'm thinking about buying either Professional or Beginning xml from wrox- any recommendations? I'm leaning toward Beginning xml and then learning soap, xslt, etc. using other resources because I don't believe a single book can cover all the topics well (i.e. Professional xml). On top of that- can a single chapter from Professional really be enough to truly learn a subject like soap or xslt and is it enough for the cert?
joe darwin
think different