diff --git a/config/vufind/author-classification.ini b/config/vufind/author-classification.ini
index 74e819f41fd9834c4e213965b55e1e4c19050d6a..50d5eb6fb6253ab5f5ee4c5dfeb6d975b517ca02 100644
--- a/config/vufind/author-classification.ini
+++ b/config/vufind/author-classification.ini
@@ -1,7 +1,10 @@
+; This file controls the assignment of roles during indexing; see
+; import/marc.properties and import/index_scripts/author.bsh for details.
 [AuthorRoles]
-firstAuthorRoles = author,adp,adapter,aut,author,cmp,composer,cre,creator,dub,dubious author,inv,inventor
-secondAuthorRoles = act,actor,anm,animator,ann,annotator,arr,arranger,acp,art copyist,art,artist,ard,artistic director,aft,author of afterword, colophon, etc.,aud,author of dialog,aui,author of introduction, etc.,aus,author of screenplay, etc.,bjd,bookjacket designer,bpd,bookplate designer,cll,calligrapher,ctg,cartographer,chr,choreographer,cng,cinematographer,clb,collaborator,clr,colorist,cmm,commentator,cwt,commentator for written text,com,compiler,cpl,complainant,cpt,complainant-appellant,cpe,complainant-appellee,ccp,conceptor,cnd,conductor,cos,contestant,cot,contestant-appellant,coe,contestant-appellee,cts,contestee,ctt,contestee-appellant,cte,contestee-appellee,ctb,contributor,crp,correspondent,cst,costume designer,cov,cover designer,cur,curator of an exhibition,dnc,dancer,dtc,data contributor,dto,dedicator,dfd,defendant,dft,defendant-appellant,dfe,defendant-appellee,dln,delineator,dpc,depicted,dsr,designer,drt,director,dis,dissertant,drm,draftsman,edt,editor,elt,electrotyper,egr,engraver,etr,etcher,fac,facsimilist,fld,field director,flm,film editor,frg,forger,ilu,illuminator,ill,illustrator,ins,inscriber,itr,instrumentalist,ivr,interviewer,ldr,laboratory director,lsa,landscape architect,led,lead,lil,libelant,lit,libelant-appellant,lie,libelant-appellee,lel,libelee,let,libelee-appellant,lee,libelee-appellee,lbt,librettist,lgd,lighting designer,ltg,lithographer,lyr,lyricist,mrb,marbler,mte,metal-engraver,msd,musical director,mus,musician,nrt,narrator,opn,opponent,org,originator,pta,patent applicant,pth,patent holder,prf,performer,pht,photographer,ptf,plaintiff,ptt,plaintiff-appellant,pte,plaintiff-appellee,prt,printer,pop,printer of plates,prm,printmaker,pro,producer,pmn,production manager,prd,production personnel, prg,programmer,pdr,project director,pbd,publishing director,ppt,puppeteer,ren,renderer,rpt,reporter,rth,research team head,rtm,research team member,res,researcher,rsp,respondent,rst,respondent-appellant,rse,respondent-appellee,rpy,responsible party,rsg,restager,rev,reviewer,rbr,rubricator,sce,scenarist,sad,scientific advisor,scr,scribe,scl,sculptor,spy,second party,std,set designer,sng,singer,sds,sound designer,spk,speaker,stm,stage manager,str,stereotyper,stl,storyteller,sht,supporting host,ths,thesis advisor,trl,translator,tyd,type designer,tyg,typographer,vdg,videographer,voc,vocalist,wde,wood-engraver,wdc,woodcutter,wam,writer of accompanying material
-nonCreativeRoles =  anl,analyst,app,applicant,arc,architect,asg,assignee,asn,associated name,att,attributed name,auc,auctioneer,aqt,author in quotations or text extracts,ant,bibliographic antecedent,bnd,binder,bdd,binding designer,blw,blurb writer,bkd,book designer,bkp,book producer,bsl,bookseller,cns,censor,cli,client,col,collector,clt,collotyper,cmt,compositor,con,conservator,csl,consultant,csp,consultant to a project,ctr,contractor,cpc,copyright claimant,cph,copyright holder,crr,corrector,dtm,data manager,dte,dedicatee,dgg,degree grantor,dpt,depositor,dbp,distribution place,dst,distributor,dnr,donor,elg,electrician,eng,engineer,evp,event place,exp,expert,fpy,first party,fmo,former owner,fnd,funder,gis,geographic information specialist,hnr,honoree,hst,host,ive,interviewee,lbr,laboratory,len,lender,lse,licensee,lso,licensor,mfp,manufacture place,mfr,manufacturer,mrk,markup editor,mdc,metadata contact,mod,moderator,mon,monitor,mcp,music copyist,orm,organizer of meeting,oth,other,own,owner,ppm,papermaker,pat,patron,pma,permitting agency,plt,platemaker,prc,process contact,prp,production place,pfr,proofreader,pup,publication place,pbl,publisher,rcp,recipient,rce,recording engineer,red,redactor,rps,repository,sec,secretary,sgn,signer,spn,sponsor,stn,standards body,srv,surveyor,tch,teacher,tcd,technical director,trc,transcriber,uvp,university place,wit,witness
+; Default relator terms taken from https://www.loc.gov/marc/relators/relaterm.html
+firstAuthorRoles = adp,aut,cmp,cre,dub,inv
+secondAuthorRoles = act,anm,ann,arr,acp,ar,ard,aft,aud,aui,aus,bjd,bpd,cll,ctg,chr,cng,clb,clr,cmm,cwt,com,cpl,cpt,cpe,ccp,cnd,cos,cot,coe,cts,ctt,cte,ctb,crp,cst,cov,cur,dnc,dtc,dto,dfd,dft,dfe,dln,dpc,dsr,drt,dis,drm,edt,elt,egr,etr,fac,fld,flm,frg,ilu,ill,ins,itr,ivr,ldr,lsa,led,lil,lit,lie,lel,let,lee,lbt,lgd,ltg,lyr,mrb,mte,msd,mus,nrt,opn,org,pta,pth,prf,pht,ptf,ptt,pte,prt,pop,prm,pro,pmn,prd,prg,pdr,pbd,ppt,ren,rpt,rth,rtm,res,rsp,rst,rse,rpy,rsg,rev,rbr,sce,sad,scr,scl,spy,std,sng,sds,spk,stm,str,stl,sht,ths,trl,tyd,tyg,vdg,voc,wde,wdc,wam
+nonCreativeRoles =  anl,app,arc,asg,asn,att,auc,aqt,ant,bnd,bdd,blw,bkd,bkp,bsl,cns,cli,col,clt,cmt,con,csl,csp,ctr,cpc,cph,crr,dtm,dte,dgg,dpt,dbp,dst,dnr,elg,eng,evp,exp,fpy,fmo,fnd,gis,hnr,hst,ive,lbr,len,lse,lso,mfp,mfr,mrk,mdc,mod,mon,mcp,orm,oth,own,ppm,pat,pma,plt,prc,prp,pfr,pup,pbl,rcp,rce,red,rps,sec,sgn,spn,stn,srv,tch,tcd,trc,uvp,wit
 
 ; Relator terms from German cataloging guideline RAK - add these to the comma separated
 ; lists above, if needed.