OCL 1.5 Quick Reference
One of the ways you can sharpen up a UML model and make it more precise is to define Object Constraint Language (OCL) constraints on it. My problem with OCL is remembering the syntax, so I’ve created a quick reference card to help me look it up when I need it. The card is here in PDF format. Note that the syntax is as of UML 1.5 as that was the syntax I used last time I did some serious work in OCL.