I am making a textbook and workbook set. I have this custom index using this code, in both the textbook and workbook: % \defineregister[learnedshort][compress=yes] \setupregister[learnedshort][style=sansbold, textstyle=slanted, n=2, pagenumber=yes, indicator=no] % \defineregister[learnedlong][compress=yes] \setupregister[learnedlong][style=sansbold, textstyle=slanted, n=2, pagenumber=yes, indicator=no] % \define[1]\learnedis{% \txt{} \getvalue{#1} \learnedshort{#1} \learnedlong{#1} } \define[1]\learned{% \learnedshort{#1} \learnedlong{\getvalue{#1}} } \starttext \learnedis{blah blah} \input knuth \learnedis{some more} \startchapter[title=Standards] \placelearnedshort \stopchapter \stoptext My question is, can I have references to the Workbook page numbers in the textbook? And visa-versa? For instance, the Textbook index currently looks like this: ------------- Standards blah blah 1 some more 2 -------------- With the data in the Workbook it might look like this: Standards blah blah 1, WB: 1, 3-8 some more 2, WB: 8-9 yet more WB: 10, 12 -------------- Is this possible to merge index information like this? --Joel