The dimensions are returned as an array of strings. The string is the textual representation of the dimension (they are not evaluated to Integers).
function getClassInformation input TypeName cl; output String restriction, comment; output Boolean partialPrefix, finalPrefix, encapsulatedPrefix; output String fileName; output Boolean fileReadOnly; output Integer lineNumberStart, columnNumberStart, lineNumberEnd, columnNumberEnd; output String dimensions[:]; output Boolean isProtectedClass; output Boolean isDocumentationClass; output String version; output String preferredView; output Boolean state; output String access; output String versionDate; output String versionBuild; output String dateModified; output String revisionId; end getClassInformation;