Available in elements (191):

abstract, alt, apiname, area, audience, author, b, body, boolean, brand, category, chdesc, chdeschd, chhead, choice, choices, choicetable, choption, choptionhd, chrow, cite, cmd, cmdname, codeblock, codeph, colspec, component, conbody, concept, context, coords, copyrholder, copyright, copyryear, created, critdates, data, data-about, dd, ddhd, delim, desc, dl, dlentry, dlhead, draft-comment, dt, dthd, entry, example, featnum, fig, figgroup, filepath, fn, foreign, fragment, fragref, glossdef, glossentry, glossterm, groupchoice, groupcomp, groupseq, i, image, imagemap, index-base, index-see, index-see-also, index-sort-as, indexterm, indextermref, info, itemgroup, keyword, keywords, kwd, li, lines, link, linkinfo, linklist, linkpool, linktext, lq, menucascade, metadata, msgblock, msgnum, msgph, navtitle, note, object, ol, oper, option, othermeta, p, param, parml, parmname, pd, permissions, ph, platform, plentry, postreq, pre, prereq, prodinfo, prodname, prognum, prolog, propdesc, propdeschd, properties, property, prophead, proptype, proptypehd, propvalue, propvaluehd, pt, publisher, q, refbody, reference, refsyn, related-links, repsep, required-cleanup, resourceid, result, revised, row, screen, searchtitle, section, sep, series, shape, shortcut, shortdesc, simpletable, sl, sli, source, state, stentry, step, stepresult, steps, steps-unordered, stepxmp, sthead, strow, sub, substep, substeps, sup, synblk, synnote, synnoteref, synph, syntaxdiagram, systemoutput, table, task, taskbody, tbody, term, tgroup, thead, title, titlealts, tm, topic, tt, tutorialinfo, u, uicontrol, ul, unknown, userinput, var, varname, vrm, vrmlist, wintitle, xref

In definitions of attributeGroups (5):

localization-atts [ref], localization-atts-translate-no [ref], univ-atts [ref], univ-atts-importance-nodefault [ref], xml:specialAttrs [ref]