Here is what a book looks like. all odd even codelens 2 3 4 5 6 2 3 4 5 6 disc circle square narrow medium wide yes no yes no 2d 3d yes no PGtikz none minor medium major left center right justify top middle bottom embed popout select default generic 2 3 4 5 6 left center right raw bibtex The WeBWorK "var" element appears in the RELAX-NG schema as a child of many elements, but almost always as a descendant of a "p" element or a "cell" element. As an element that is only relevant for a WeBWorK problem, occurrences of "var" must be within a "webwork" element. A Schematron rule will check on these two situations. angle decimal exponent formula fraction inequality integer interval logarithm limit number point syntax quantity vector popup buttons none essay local global hybrid type-local type-global type-hybrid phrase-global phrase-hybrid title custom yes no star dstar tstar dagger ddagger tdagger daggerdbl ddaggerdbl tdaggerdbl hash dhash thash maltese dmaltese tmaltese yes no yes no yes no yes no yes no 0 1 2 3 4 5 6 7 8 9 10 A B C D E F G a b c d e f g 1 2 3 4 5 6 7 8 9 10 doublesharp sharp flat doubleflat 1 2 3 4 5 yes no yes no yes no PGtikz short long decorative structural