What does [x*=Ÿ??yŸ?] and [x^=Ÿ??yŸ?] mean in CSS?

What does [x*=Ÿ??yŸ?] and [x^=Ÿ??yŸ?] mean in CSS? References

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1. www.portanna.org

   ... ply/3,41.4718433,9.0143860 ply/4,41.4881721,9.0143911 dtm/0,0 bsbhdr ced/se=2005,re=43,ed=2009 bsbhdr knp/sd=mean low water ... Ã @f@cß à dcnuhë ã knÅ 9 ...

   www.portanna.org/download/opencpn/​GoogleMap-2-OpenCPN/RW...
   

2. www.cincomsmalltalk.com

   ... then test x$verb = xy && echo \" $1 does not contain an embedded MD5 checksum.\" >&2 else md5sum=`MS_dd \"$1\" $offset $s | eval \"$MD5_PATH $MD5_ARG\" | cut -b ...

   www.cincomsmalltalk.com/pub/cstnc/​visualworks/installer...
   

3. www.noao.edu

   SIMPLE = T / file does conform to FITS standard BITPIX = 16 / number of bits per data pixel ... D> a2>x?ÿ>YŸ”>6MÃŒ> ­Å½> Ã" > ÂØ> m ...

   www.noao.edu/cflib/V1/BINTABLE/​80499.fits
   

4. www.bessystem.com

   ... if not, just use regular df and # hope it does what we expect [ $LAX_DEBUG ] ... (meaning the install dir). If user.dir is # any other directory, ...

   www.bessystem.com/content/​downData.htm?id=_10e6fc67b5894...
   

5. www.portanna.org

   ... ply/3,41.8698896,8.6368847 ply/4,41.8968786,8.6365808 dtm/0,0 bsbhdr ced/se=2005,re=43,ed=2009 bsbhdr knp/sd=mean low water springs,pp=-23 ifm/7 rgb/1 ...

   www.portanna.org/download/opencpn/​GoogleMap-2-OpenCPN/RW...
   

6. iisee.kenken.go.jp

   ... ¯xº×”ªªªªªªªªªªªªªªªªªªª«žXz ”?Å 2‡ü¸¹G £ Ã"ªqŽÌ’ÛêcËþó¨þW©Ã"ÿ èÇó=DÅ"s”HÈc1ÿ wŽ2ûÿ ) ...

   iisee.kenken.go.jp/staff/tamura/work/​standard/01world/... - Cached
   

7. : Department of Financial Services, Government of India

   ... e ·Úûÿñk^’£ jv h¤, dÅ" zŽ9ã“î2·ÐÆ'ü© - S ªÅ"1žÆ'=h ôÖ`Æ's Ã"Å¡ ®#VØÌ¡½ ü«†ñÝÃ'[xÃ' Å"îõ vÍwÊÁ€e9 E-gé’!·

   financialservices.gov.in/​download.asp?rec=114&... - Cached