DROP TABLE IF EXISTS config.index_normalizer CASCADE;
CREATE OR REPLACE FUNCTION public.naco_normalize( TEXT, TEXT ) RETURNS TEXT AS $func$
+
+ use strict;
use Unicode::Normalize;
use Encode;
- # When working with Unicode data, the first step is to decode it to
- # a byte string; after that, lowercasing is safe
- my $txt = lc(decode_utf8(shift));
+ my $str = decode_utf8(shift);
my $sf = shift;
- $txt = NFD($txt);
- $txt =~ s/\pM+//go; # Remove diacritics
-
- # remove non-combining diacritics
- # this list of characters follows the NACO normalization spec,
- # but a looser but more comprehensive version might be
- # $txt =~ s/\pLm+//go;
- $txt =~ tr/\x{02B9}\x{02BA}\x{02BB}\x{02BC}//d;
-
- $txt =~ s/\xE6/AE/go; # Convert ae digraph
- $txt =~ s/\x{153}/OE/go;# Convert oe digraph
- $txt =~ s/\xFE/TH/go; # Convert Icelandic thorn
-
- $txt =~ tr/\x{2070}\x{2071}\x{2072}\x{2073}\x{2074}\x{2075}\x{2076}\x{2077}\x{2078}\x{2079}\x{207A}\x{207B}/0123456789+-/;# Convert superscript numbers
- $txt =~ tr/\x{2080}\x{2081}\x{2082}\x{2083}\x{2084}\x{2085}\x{2086}\x{2087}\x{2088}\x{2089}\x{208A}\x{208B}/0123456889+-/;# Convert subscript numbers
-
- $txt =~ tr/\x{0251}\x{03B1}\x{03B2}\x{0262}\x{03B3}/AABGG/; # Convert Latin and Greek
- $txt =~ tr/\x{2113}\xF0\x{111}\!\"\(\)\-\{\}\<\>\;\:\.\?\xA1\xBF\/\\\@\*\%\=\xB1\+\xAE\xA9\x{2117}\$\xA3\x{FFE1}\xB0\^\_\~\`/LDD /; # Convert Misc
- $txt =~ tr/\'\[\]\|//d; # Remove Misc
-
- if ($sf && $sf =~ /^a/o) {
- my $commapos = index($txt,',');
- if ($commapos > -1) {
- if ($commapos != length($txt) - 1) {
- my @list = split /,/, $txt;
- my $first = shift @list;
- $txt = $first . ',' . join(' ', @list);
- } else {
- $txt =~ s/,/ /go;
- }
- }
- } else {
- $txt =~ s/,/ /go;
- }
-
- $txt =~ s/\s+/ /go; # Compress multiple spaces
- $txt =~ s/^\s+//o; # Remove leading space
- $txt =~ s/\s+$//o; # Remove trailing space
-
- # Encoding the outgoing string is good practice, but not strictly
- # necessary in this case because we've stripped everything from it
- return encode_utf8($txt);
+ # Apply NACO normalization to input string; based on
+ # http://www.loc.gov/catdir/pcc/naco/SCA_PccNormalization_Final_revised.pdf
+ #
+ # Note that unlike a strict reading of the NACO normalization rules,
+ # output is returned as lowercase instead of uppercase for compatibility
+ # with previous versions of the Evergreen naco_normalize routine.
+
+ # Convert to upper-case first; even though final output will be lowercase, doing this will
+ # ensure that the German eszett (ß) and certain ligatures (ff, fi, ffl, etc.) will be handled correctly.
+ # If there are any bugs in Perl's implementation of upcasing, they will be passed through here.
+ $str = uc $str;
+
+ # remove non-filing strings
+ $str =~ s/\x{0098}.*?\x{009C}//g;
+
+ $str = NFKD($str);
+
+ # additional substitutions - 3.6.
+ $str =~ s/\x{00C6}/AE/g;
+ $str =~ s/\x{00DE}/TH/g;
+ $str =~ s/\x{0152}/OE/g;
+ $str =~ tr/\x{0110}\x{00D0}\x{00D8}\x{0141}\x{2113}\x{02BB}\x{02BC}]['/DDOLl/d;
+
+ # transformations based on Unicode category codes
+ $str =~ s/[\p{Cc}\p{Cf}\p{Co}\p{Cs}\p{Lm}\p{Mc}\p{Me}\p{Mn}]//g;
+
+ if ($sf && $sf =~ /^a/o) {
+ my $commapos = index($str, ',');
+ if ($commapos > -1) {
+ if ($commapos != length($str) - 1) {
+ $str =~ s/,/\x07/; # preserve first comma
+ }
+ }
+ }
+
+ # since we've stripped out the control characters, we can now
+ # use a few as placeholders temporarily
+ $str =~ tr/+&@\x{266D}\x{266F}#/\x01\x02\x03\x04\x05\x06/;
+ $str =~ s/[\p{Pc}\p{Pd}\p{Pe}\p{Pf}\p{Pi}\p{Po}\p{Ps}\p{Sk}\p{Sm}\p{So}\p{Zl}\p{Zp}\p{Zs}]/ /g;
+ $str =~ tr/\x01\x02\x03\x04\x05\x06\x07/+&@\x{266D}\x{266F}#,/;
+
+ # decimal digits
+ $str =~ tr/\x{0660}-\x{0669}\x{06F0}-\x{06F9}\x{07C0}-\x{07C9}\x{0966}-\x{096F}\x{09E6}-\x{09EF}\x{0A66}-\x{0A6F}\x{0AE6}-\x{0AEF}\x{0B66}-\x{0B6F}\x{0BE6}-\x{0BEF}\x{0C66}-\x{0C6F}\x{0CE6}-\x{0CEF}\x{0D66}-\x{0D6F}\x{0E50}-\x{0E59}\x{0ED0}-\x{0ED9}\x{0F20}-\x{0F29}\x{1040}-\x{1049}\x{1090}-\x{1099}\x{17E0}-\x{17E9}\x{1810}-\x{1819}\x{1946}-\x{194F}\x{19D0}-\x{19D9}\x{1A80}-\x{1A89}\x{1A90}-\x{1A99}\x{1B50}-\x{1B59}\x{1BB0}-\x{1BB9}\x{1C40}-\x{1C49}\x{1C50}-\x{1C59}\x{A620}-\x{A629}\x{A8D0}-\x{A8D9}\x{A900}-\x{A909}\x{A9D0}-\x{A9D9}\x{AA50}-\x{AA59}\x{ABF0}-\x{ABF9}\x{FF10}-\x{FF19}/0-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-9/;
+
+ # intentionally skipping step 8 of the NACO algorithm; if the string
+ # gets normalized away, that's fine.
+
+ # leading and trailing spaces
+ $str =~ s/\s+/ /g;
+ $str =~ s/^\s+//;
+ $str =~ s/\s+$//g;
+
+ return lc $str;
$func$ LANGUAGE 'plperlu' STRICT IMMUTABLE;
-- Some handy functions, based on existing ones, to provide optional ingest normalization
--- /dev/null
+BEGIN;
+
+INSERT INTO config.upgrade_log (version) VALUES ('0478'); -- gmcharlt
+
+CREATE OR REPLACE FUNCTION public.naco_normalize( TEXT, TEXT ) RETURNS TEXT AS $func$
+
+ use strict;
+ use Unicode::Normalize;
+ use Encode;
+
+ my $str = decode_utf8(shift);
+ my $sf = shift;
+
+ # Apply NACO normalization to input string; based on
+ # http://www.loc.gov/catdir/pcc/naco/SCA_PccNormalization_Final_revised.pdf
+ #
+ # Note that unlike a strict reading of the NACO normalization rules,
+ # output is returned as lowercase instead of uppercase for compatibility
+ # with previous versions of the Evergreen naco_normalize routine.
+
+ # Convert to upper-case first; even though final output will be lowercase, doing this will
+ # ensure that the German eszett (ß) and certain ligatures (ff, fi, ffl, etc.) will be handled correctly.
+ # If there are any bugs in Perl's implementation of upcasing, they will be passed through here.
+ $str = uc $str;
+
+ # remove non-filing strings
+ $str =~ s/\x{0098}.*?\x{009C}//g;
+
+ $str = NFKD($str);
+
+ # additional substitutions - 3.6.
+ $str =~ s/\x{00C6}/AE/g;
+ $str =~ s/\x{00DE}/TH/g;
+ $str =~ s/\x{0152}/OE/g;
+ $str =~ tr/\x{0110}\x{00D0}\x{00D8}\x{0141}\x{2113}\x{02BB}\x{02BC}]['/DDOLl/d;
+
+ # transformations based on Unicode category codes
+ $str =~ s/[\p{Cc}\p{Cf}\p{Co}\p{Cs}\p{Lm}\p{Mc}\p{Me}\p{Mn}]//g;
+
+ if ($sf && $sf =~ /^a/o) {
+ my $commapos = index($str, ',');
+ if ($commapos > -1) {
+ if ($commapos != length($str) - 1) {
+ $str =~ s/,/\x07/; # preserve first comma
+ }
+ }
+ }
+
+ # since we've stripped out the control characters, we can now
+ # use a few as placeholders temporarily
+ $str =~ tr/+&@\x{266D}\x{266F}#/\x01\x02\x03\x04\x05\x06/;
+ $str =~ s/[\p{Pc}\p{Pd}\p{Pe}\p{Pf}\p{Pi}\p{Po}\p{Ps}\p{Sk}\p{Sm}\p{So}\p{Zl}\p{Zp}\p{Zs}]/ /g;
+ $str =~ tr/\x01\x02\x03\x04\x05\x06\x07/+&@\x{266D}\x{266F}#,/;
+
+ # decimal digits
+ $str =~ tr/\x{0660}-\x{0669}\x{06F0}-\x{06F9}\x{07C0}-\x{07C9}\x{0966}-\x{096F}\x{09E6}-\x{09EF}\x{0A66}-\x{0A6F}\x{0AE6}-\x{0AEF}\x{0B66}-\x{0B6F}\x{0BE6}-\x{0BEF}\x{0C66}-\x{0C6F}\x{0CE6}-\x{0CEF}\x{0D66}-\x{0D6F}\x{0E50}-\x{0E59}\x{0ED0}-\x{0ED9}\x{0F20}-\x{0F29}\x{1040}-\x{1049}\x{1090}-\x{1099}\x{17E0}-\x{17E9}\x{1810}-\x{1819}\x{1946}-\x{194F}\x{19D0}-\x{19D9}\x{1A80}-\x{1A89}\x{1A90}-\x{1A99}\x{1B50}-\x{1B59}\x{1BB0}-\x{1BB9}\x{1C40}-\x{1C49}\x{1C50}-\x{1C59}\x{A620}-\x{A629}\x{A8D0}-\x{A8D9}\x{A900}-\x{A909}\x{A9D0}-\x{A9D9}\x{AA50}-\x{AA59}\x{ABF0}-\x{ABF9}\x{FF10}-\x{FF19}/0-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-90-9/;
+
+ # intentionally skipping step 8 of the NACO algorithm; if the string
+ # gets normalized away, that's fine.
+
+ # leading and trailing spaces
+ $str =~ s/\s+/ /g;
+ $str =~ s/^\s+//;
+ $str =~ s/\s+$//g;
+
+ return lc $str;
+$func$ LANGUAGE 'plperlu' STRICT IMMUTABLE;
+
+COMMIT;
projects / evergreen-equinox.git / commitdiff