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SAO/NASA ADS Abstract Service Stopword List

The ADS search system recognizes certain words as being not important for searches and removes those words from a search. There are two types of stopwords, case insensitive stopwords and case sensitive stopwords. The former are words like much and but. They are ignored in a search. The latter are words that are stop words in some context, but are significant in other contexts. For instance and is a stopword, but And is significant. Since and does not occur at the beginning of a sentence, we assume that anytime And is in the text, it means Andromeda.

Following are the lists of case sensitive stopwords and case insensitive stopwords for the three ADS databases.

The case sensitive stopword lists are significant because if you want to search for And you have to specify the correct case, otherwise the word gets removed from the query.



Case sensitive stopwords for the Astronomy database


    AND      An      BE      By      Go      No      SN      Th 
     al      am      an     and      be      by      go      he 
    her      ie    nice      no     sic      sn      th 

Case insensitive stopwords for the Astronomy database


              A            ABLE           ABOUT         ACQUIRE          ACROSS 
 AFOREMENTIONED           AFTER           AGAIN         AGAINST           AHEAD 
           AIMS            AKIN          ALBEIT          ALMOST         ALREADY 
           ALSO        ALTHOUGH      ALTOGETHER          ALWAYS              AM 
        AMAZING       AMAZINGLY            AMID          AMIDST           AMONG 
        AMONGST              AN             AND            ANEW         ANOTHER 
            ANY         ANYMORE          ANYONE        ANYTHING          ANYWAY 
       ANYWHERE           APPLY             ARE          AROUND              AS 
             AT            ATOP    AVAILABILITY       AVAILABLE           AWAIT 
        AWAITED        AWAITING          AWAITS            AWAY          BECAME 
        BECAUSE          BECOME         BECOMES        BECOMING            BEEN 
         BEFALL          BEFORE      BEFOREHAND           BEGIN           BEING 
         BELONG          BESIDE         BESIDES            BEST            BOTH 
          BRING             BUT              BY            CALL            CAME 
            CAN          CANNOT            COME           COMES          COMING 
        COMINGS           COULD            DEEM          DEEMED         DEEMING 
        DESPITE             DID       DISCUSSED          DISUSE              DO 
           DOES           DOING            DONE             DUE            DULY 
           EACH          EITHER            ELSE       ELSEWHERE          ENOUGH 
      ERSTWHILE              ET             ETC            EVER           EVERY 
      EVERYBODY        EVERYDAY        EVERYONE      EVERYTHING      EVERYWHERE 
        FINALLY          FOLLOW             FOR         FOREVER           FOUND 
           FROM            FUER         FURTHER      FURTHERING     FURTHERMORE 
       FURTHERS            GAVE             GET            GIVE           GIVEN 
          GIVER           GIVES          GIVING              GO           GOING 
           GONE             GOT             HAD          HAPPEN        HAPPENED 
      HAPPENING         HAPPENS    HAPPENSTANCE             HAS            HAVE 
         HAVING              HE           HENCE             HER            HERS 
            HIM         HIMSELF             HIS        HITHERTO             HOW 
        HOWEVER              IF              IN        INASMUCH          INDEED 
        INSOFAR         INSTEAD            INTO              IS              IT 
            ITS          ITSELF            JUST            KEEP         KEEPING 
          KEEPS            KEPT            KIND            KNEW            KNOW 
      KNOWLEDGE         KNOWING           KNOWN           KNOWS            LEST 
            LET            LETS            LIKE      LIKELINESS         LIKENED 
         LIKENS           LIKES        LIKEWISE            LIST            MADE 
           MAKE             MAY           MAYBE        MEANTIME       MEANWHILE 
           MERE          MERELY           MIGHT          MIGHTY        MOREOVER 
         MOSTLY            MUCH            MUST              MY            NEED 
         NEEDED         NEEDING        NEEDLESS      NEEDLESSLY           NEEDS 
        NEITHER           NEVER    NEVERTHELESS            NEXT            NICE 
         NICELY              NO     NONETHELESS             NOT NOTWITHSTANDING 
       NOWADAYS         NOWHERE        OBTAINED              OF             OFF 
           OFFS           OFTEN         OFTENLY              ON            ONCE 
           ONES         ONESELF         ONGOING            ONLY            ONTO 
         ONWARD         ONWARDS              OR           OTHER          OTHERS 
      OTHERWISE           OUGHT             OUR            OURS       OURSELVES 
            OUT     OUTSTANDING   OUTSTANDINGLY             OWN           OWNED 
        PERHAPS          PONDER      PONDERABLE        POSSIBLE        POSSIBLY 
      PRESENTED             PUT            PUTS         PUTTING           QUERY 
       QUESTION           QUITE          RATHER          REALLY            REDO 
        REDOING          REDONE         RESULTS            SAID            SAME 
            SAY          SAYING            SAYS             SEE            SEEM 
         SEEMED         SEEMING       SEEMINGLY           SEEMS          SELDOM 
          SHALL             SHE          SHOULD            SHOW          SHOWED 
        SHOWING           SHOWN           SHOWS             SIC           SINCE 
            SIT            SITS         SITTING              SO            SOME 
        SOMEDAY         SOMEHOW         SOMEONE       SOMETHING        SOMETIME 
      SOMETIMES        SOMEWHAT       SOMEWHERE        SOMTIMES            SOON 
         SOONER            SUCH         SUGGEST       SUGGESTED        SUGGESTS 
           SURE          SURELY          SUREST            TAKE           TAKEN 
         TAKENS           TAKES          TAKING            TALE          TALLER 
        TALLIED         TALLIES            TELL           TELLS            TEND 
         TENDED         TENDING           TENDS            THAN            THAT 
            THE            THEE           THEIR          THEIRS            THEM 
     THEMSELVES            THEN          THENCE     THENCEFORTH      THEREAFTER 
        THEREBY       THEREFORE       THEREFROM         THEREIN         THEREOF 
        THEREON         THERETO       THEREWITH           THESE            THEY 
           THIS        THOROUGH      THOROUGHLY         THORUGH           THOSE 
         THOUGH      THOUGHTFUL     THOUGHTLESS      THROUGHOUT            THRU 
           THUS             TIL            TILL              TO        TOGETHER 
            TOO            TOOK      TREMENDOUS    TREMENDOUSLY           TRIED 
          TRIES          TRUTHS             TRY          TRYING          UNABLE 
 UNAVAILABILITY     UNAVAILABLE         UNAWARE         UNDERGO       UNDERGOES 
     UNDERGOING       UNDERGONE       UNDERTAKE      UNDERTAKEN      UNDERTAKES 
    UNDERTAKING    UNDERTAKINGS       UNDERTOOK        UNDERWAY       UNDERWENT 
          UNDUE          UNDULY     UNFORTUNATE   UNFORTUNATELY         UNFOUND 
         UNLESS           UNTIL            UPON           UPSET          UPSETS 
      UPSETTING          UPTAKE            URGE           URGED          URGENT 
       URGENTLY              US          USABLE          USAGES         USEABLE 
           USED          USEFUL      USEFULNESS         USELESS            USES 
          USING           USUAL         USUALLY        UTILISED        UTILISES 
        UTILIZE        UTILIZED        UTILIZES       UTILIZING          UTMOST 
        UTTERLY          VASTLY             VIA             VIS           VIVID 
        VIVIDLY            WANT          WANTED         WANTING           WANTS 
            WAS             WAY              WE         WELCOME        WELCOMED 
           WENT            WERE            WHAT        WHATEVER      WHATSOEVER 
           WHEN          WHENCE        WHENEVER           WHERE         WHEREAS 
        WHEREBY       WHEREFROM         WHEREIN         WHERETO       WHEREUPON 
       WHEREVER         WHETHER           WHICH       WHICHEVER           WHILE 
         WHILST             WHO         WHOEVER       WHOLESALE          WHOLLY 
           WHOM        WHOMEVER      WHOMSOEVER           WHOSE             WHY 
           WILL         WILLING     WILLINGNESS          WISDOM            WISE 
           WISH          WISHED          WISHES         WISHING             WIT 
           WITH      WITHDRAWAL     WITHDRAWING       WITHDRAWN          WITHIN 
        WITHOUT       WITHSTAND    WITHSTANDING          WONDER       WONDERFUL 
    WONDERFULLY       WONDERING      WONDERLAND         WONDERS        WONDROUS 
           WORD           WORDS            WORN           WOULD             YES 
            YET             YOU            YOUR 



Case sensitive stopwords for the Physics database


    AND      An      BE      By      Go      No      SN      Th 
     al      am      an     and      be      by      go      he 
    her      ie    nice      no     sic      sn      th    very 

Case insensitive stopwords for the Physics database


              A            AAND            ABLE           ABOUT           ABOVE 
        ACQUIRE          ACROSS  AFOREMENTIONED           AFTER           AGAIN 
        AGAINST             AGO           AGREE       AGREEABLE           AHEAD 
           AKIN          ALBEIT          ALCUNE        ALGHOUGH         ALGUNOS 
            ALL          ALMOST           ALONE           ALONG         ALREADY 
            ALS            ALSO        ALTHOGUH         ALTHOUG        ALTHOUGH 
      ALTHOUUGH       ALTHROUGH      ALTOGETHER          ALWAYS         AMAZING 
      AMAZINGLY       AMBITIOUS      AMBIVALENT            AMID          AMIDST 
          AMONG         AMONGST          AMOUNS          AMOUNT        AMOUNTED 
      AMOUNTING         AMOUNTS            ANEW         ANOTHER             ANY 
        ANYMORE          ANYONE        ANYTHING          ANYWAY        ANYWHERE 
          APART           APRES           APRES           APTLY         APTNESS 
            ARE           ARENT         ARISING         AROOUND         ARORUND 
         AROUND              AS         ASSUMED              AT            ATOP 
            AUF         AUJOURD          AUTOUR           AUTRE             AUX 
       AVAILABE    AVAILABILITY       AVAILABLE       AVALIABLE           AVANT 
           AVEC       AVIALABLE           AWAIT         AWAITED        AWAITING 
         AWAITS            AWAY           AYANT             BAD              BE 
         BECAME         BECAMES         BECASUE         BECAUSE          BECOME 
        BECOMES        BECOMING         BECUASE           BEEEN          BEEING 
           BEEN          BEFALL          BEFORE      BEFOREHAND          BEHIND 
            BEI           BEING       BEKANNTEN          BELONG          BELONG 
         BELONG        BELONGED       BELONGING         BENIGHT          BEREFT 
         BESIDE         BESIDES            BEST          BETEEN          BETTER 
       BETWEEEN         BETWEEM         BETWEEN          BETWEN          BEWEEN 
         BISHER         BIZARRE            BOTH           BRING          BUSILY 
            BUT          BUYING            CALL            CAME             CAN 
         CANNOT            CANT           CETTE          CHAQUE          CHOSEN 
            COL            COME           COMES          COMING         COMINGS 
            CON          CONNUE      CONSIDERED           COULD         COULDNT 
            DAL            DANS             DAS            DEEM          DEEMED 
        DEEMING           DEGLI           DELLA           DELLE             DEM 
         DEPRES             DES         DESPITE             DID          DISUSE 
             DO            DOES           DOESN          DOESNT           DOING 
         DOINGS            DONE            DONT              DU             DUE 
           DULY           DURCH         DURINGS            EACH              ED 
            EIN            EINE           EINEM           EINER           EINES 
         EINIGE         EINIGER        EINNIGER          EITHER            ELLE 
           ELSE       ELSEWHERE           ENFIN          ENOUGH       ERSTWHILE 
            EST              ET             ETC            EVER           EVERY 
      EVERYBODY        EVERYDAY        EVERYONE      EVERYTHING      EVERYWHERE 
         FAITES         FINALLY          FOLLOW             FOR         FOREVER 
          FOUND            FROM            FUER             FUR         FURTHER 
      FURTHERED      FURTHERING     FURTHERMORE        FURTHERS        FURTHEST 
         FUTHER            GAVE           GEGEN             GET            GIVE 
         GIVEEN           GIVEN           GIVER           GIVES          GIVING 
          GOING            GONE             GOT             HAD          HAPPEN 
      HAPPENDED        HAPPENED       HAPPENING      HAPPENINGS         HAPPENS 
   HAPPENSTANCE          HARDLY             HAS           HASNT            HAST 
         HASTEN        HASTENED         HASTENS            HATH            HAVE 
         HAVENT          HAVING           HENCE        HERAFTER            HERE 
      HEREAFTER      HEREBEFORE          HEREIN      HERETOFORE        HEREWITH 
           HERS             HIM         HIMSELF             HIS         HITERTO 
       HITHERTO            HORS             HOW         HOWEVER             HUI 
       IDEALISE        IDEALISM              IF              IM              IN 
       INASMUCH          INDEED         INGOING         INSOFAR         INSTEAD 
        INTERIM            INTO              IS            ISNT              IT 
            ITS          ITSELF            JUST            KEEP         KEEPING 
          KEEPS            KEPT            KIND            KNEW            KNOW 
        KNOWING           KNOWS              LA             LES            LEST 
            LET            LETS            LEUR            LEUR           LEURS 
           LIKE      LIKELINESS         LIKENED          LIKENS           LIKES 
       LIKEWISE          LIKLEY            MADE            MAIS            MAKE 
          MAKES          MAKING             MAY           MAYBE        MEANTIME 
      MEANWHILE           MEINE            MEME            MERE          MERELY 
          MIGHT          MIGHTY        MOREOVER          MOSTLY            MUCH 
           MUST              MY            NACH        NACHSTEN            NEED 
         NEEDED         NEEDING        NEEDLESS      NEEDLESSLY           NEEDS 
          NEEED           NEGLI         NEITHER             NEL            NELL 
          NEVER    NEVERTHELESS   NEVERTHERLESS    NEVETHERLESS            NEXT 
         NICELY           NICHT            NONE     NONETHELESS             NOT 
        NOTHING           NOTRE NOTWITHSTANDING             NOW        NOWADAYS 
        NOWHERE        OBTAINED              OF             OFF            OFFS 
          OFTEN         OFTENLY              ON            ONCE            ONES 
        ONESELF           ONETO         ONGOING            ONLY            ONTO 
         ONWARD         ONWARDS              OR           OTHER          OTHERS 
      OTHERWISE        OTHEWISE              OU           OUGHT             OUR 
           OURS       OURSELVES             OUT     OUTSTANDING   OUTSTANDINGLY 
            OWN           OWNED           PAPER            PART         PENDANT 
        PERHAPS        PERPHAPS            PEUT          PONDER      PONDERABLE 
       POSSIBLE        POSSIBLY        PRESENTD       PRESENTED            PRIS 
         PROPOS             PUT            PUTS         PUTTING             QUE 
           QUEL        QUELQUES           QUERY        QUESTION           QUICK 
        QUICKLY           QUITE          QURREY         RACONTE          RATHER 
         REALLY            REDO         REDOING          REDONE            SAID 
           SAME             SAY          SAYING            SAYS             SEE 
           SEEM          SEEMED         SEEMING       SEEMINGLY           SEEMS 
           SEHR          SEINER            SEIT          SELDOM        SEMBLAVA 
          SHALL             SHE          SHOULD        SHOULDNT            SHOW 
         SHOWED         SHOWING           SHOWN           SHOWS           SINCE 
            SIT            SITS         SITTING              SO           SOBRE 
           SOME         SOMEDAY         SOMEHOW         SOMEONE       SOMETHING 
       SOMETIME       SOMETIMES        SOMEWHAT       SOMEWHERE        SOMTIMES 
       SOMWEHAT            SOON          SOONER            SUCH         SUGGEST 
      SUGGESTED        SUGGESTS           SUGLI           SULLA           SULLE 
           SURE          SURELY          SUREST         SURMISE        SURMISED 
           TAKE           TAKEN          TAKENS           TAKES          TAKING 
           TALE          TALLER         TALLIED         TALLIES             TEH 
           TELL           TELLS            TEND          TENDED         TENDING 
          TENDS            THAN           THANK         THANKED          THANKS 
           THAT             THE            THEE           THEIR          THEIRS 
           THEM      THEMSELVES            THEN          THENCE     THENCEFORTH 
         THERBY           THERE      THEREAFTER         THEREBY       THEREFORE 
      THEREFORM       THEREFROM         THEREIN         THEREOF         THEREON 
        THERETO       THEREWITH        THERFORE           THESE            THEY 
          THEYS            THHE            THIS        THOROUGH      THOROUGHLY 
    THOROUGHPUT         THORUGH           THOSE          THOUGH       THOUGHOUT 
        THOUGHT      THOUGHTFUL     THOUGHTLESS      THOUGHTOUT        THOUGHTS 
     THREREFORE       THROUGHLY      THROUGHOUT      THROUGHPUT     THROUGHPUTS 
       THROUGHS        THROUGHT            THRU            THUS         THUSFAR 
            TIL            TILL              TO           TODAY          TODAYS 
       TOGETHER           TOGOT        TOMORROW             TOO            TOOK 
     TREMENDOUS    TREMENDOUSLY           TREND          TRENDS            TRES 
          TRIED           TRIES            TRIP        TROUVEES     TRUSTWORTHY 
         TRUTHS             TRY          TRYING            UBER      UBIGUITOUS 
    UBIQUITIOUS      UBIQUITOUS    UBIQUITOUSLY  UBIQUITOUSNESS        UBIQUITY 
     UBIQUOTOUS            UGLY              UM              UN          UNABLE 
 UNAVAILABILITY     UNAVAILABLE         UNAWARE             UND         UNDERGO 
      UNDERGOES      UNDERGOING       UNDERGONE        UNDERGOS      UNDERNEATH 
   UNDERSTUDIED       UNDERTAKE      UNDERTAKEN      UNDERTAKES     UNDERTAKING 
   UNDERTAKINGS       UNDERTOOK        UNDERWAY       UNDERWENT           UNDUE 
         UNDULY             UNE    UNEMCUMBERED   UNEQUIVOCABLY     UNEQUIVOCAL 
  UNEQUIVOCALLY     UNFORTUNATE   UNFORTUNATELY         UNFOUND      UNFURLABLE 
      UNFURLING       UNHURRIED          UNLESS          UNLIKE    UNLIKELINESS 
        UNLIKEY         UNLIKLY      UNPLEASANT          UNSERE         UNSERER 
        UNSERES           UNTER           UNTIL        UNTOWARD         UNTRIED 
       UNUSABLE          UNUSED        UNWANTED        UNWIELDY        UPADATED 
       UPCOMING         UPGOING          UPHELD            UPON       UPPERMOST 
          UPSET          UPSETS       UPSETTING          UPTAKE            UPTO 
           URGE