Changeset 15018 for gsdl/trunk


Ignore:
Timestamp:
2008-02-27T17:07:17+13:00 (16 years ago)
Author:
davidb
Message:

Marc mapping upgraded to support richer set of operations, including subfields, multiple fields in one line (separated by comma), and the removal of rules, e.g. -245 at the start of a line. A Marc to Qualified Dublin Core crosswalk from the Library of congress has been added as "etc/marc2qdc.txt". A collection can then choose to, for example, top up the mapping with its own version of the file stored in its local "etc" folder, specifying only the rules that are different. This is where a rule like "-245" might be used to override a more general rule from the main file that has all subfields in 245 mapping to one metadata item (Title). If the user specifies a different different filename -- through a plugin option -- then they are free to divise a mapping from scratch and store it in the collections local "etc" folder.

Location:
gsdl/trunk
Files:
1 added
5 edited

Legend:

Unmodified
Added
Removed

  • gsdl/trunk/perllib/plugins/BasPlug.pm

    r15006 r15018  
    109109    'type' => "string",
    110110    'reqd' => "no" },
     111      { 'name' => "use_as_doc_identifier",
     112    'desc' => "{BasPlug.use_as_doc_identifier}",
     113    'type' => "string",
     114    'reqd' => "no" ,
     115    'deft' => "" } ,
    111116      { 'name' => "input_encoding",
    112117    'desc' => "{BasPlug.input_encoding}",
    … …  
    867872}
    868873
     874
     875sub add_OID
     876{
     877    my $self = shift (@_); 
     878    my ($doc_obj) = @_;
     879
     880    # See if a metadata field is specified as the field
     881    if ((defined $self->{'use_as_doc_identifier'}) && ($self->{'use_as_doc_identifier'} ne "")) {
     882    my $metadata_doc_id = $self->{'use_as_doc_identifier'};
     883
     884    # Consider "tidying" up metadata_doc_id to be something
     885    # suitable in a URL
     886    # Could even support a user specified plugin RE for this.
     887
     888    my $top_section = $doc_obj->get_top_section();
     889    my $oid = $doc_obj->get_metadata_element($top_section,$metadata_doc_id);
     890##  print STDERR "**** oid = $oid\n";
     891        $doc_obj->set_OID($oid);
     892    }
     893    # See if there is a plugin-specific set_OID function...
     894    elsif (defined ($self->can('set_OID'))) {
     895    # it will need $doc_obj to set the Identifier metadata...
     896    $self->set_OID(@_); # pass through any extra arguments supplied
     897    } else {
     898    # use the default set_OID() in doc.pm
     899    $doc_obj->set_OID();
     900    }
     901}
    869902
    870903# The BasPlug read_into_doc_obj() function. This function does all the
    … …  
    957990    # do any automatic metadata extraction
    958991    $self->auto_extract_metadata ($doc_obj);
    959    
    960     # add an OID
    961     # see if there is a plugin-specific set_OID function...
    962     if (defined ($self->can('set_OID'))) {
    963     # it will need $doc_obj to set the Identifier metadata...
    964     $self->set_OID($doc_obj);
    965     } else {
    966     # use the default set_OID() in doc.pm
    967     $doc_obj->set_OID();
    968     }
     992
     993    $self->add_OID($doc_obj);
    969994   
    970995    return (1,$doc_obj);

  • gsdl/trunk/perllib/plugins/MARCPlug.pm

    r14964 r15018  
    4545    'type' => "string",
    4646    'deft' => "marctodc.txt",
     47    'hiddengli' = "yes", # deprecated in favour or 'metadata_mapping_file'
     48    'reqd' => "no" },
     49      { 'name' => "metadata_mapping_file",
     50    'desc' => "{MARCXMLPlug.metadata_mapping_file}",
     51    'type' => "string",
     52    'deft' => "",
    4753    'reqd' => "no" },
    4854      { 'name' => "process_exp",
    … …  
    8086    my $self = new SplitPlug($pluginlist, $inputargs, $hashArgOptLists);
    8187
     88    # 'metadata_mapping' was used in two ways in the plugin: as a plugin
     89    # option (filename) and as a datastructure to represent the mapping.
     90    # In MARXXMLPlug (written later) the two are separated: filename is
     91    # represented through 'metadata_mapping_file' and the data-structure
     92    # mapping left as 'metadata_mapping'
     93    # 'metadata_mapping' still present (but hidden in GLI) for
     94    # backwards compatibility, but 'metadata_mapping_file' is used by
     95    # preference
     96
     97    if ($self->{'metadata_mapping_file'} eq "") {
     98    # If nothing set in the new version, use the old version
     99    # that defaults to 'marctodc.txt'
     100    $self->{'metadata_mapping_file'} = $self->{'metadata_mapping'};
     101    }
     102
    82103    $self->{'type'} = "";
    83104   
    … …  
    92113
    93114    # read in the metadata mapping file
    94     my $mm_file =
    95     &util::filename_cat( $ENV{'GSDLHOME'}, "etc", $self->{'metadata_mapping'} );
    96 
    97     if (!-e $mm_file)
     115
     116    my $mm_file = &util::locate_config_file($self->{'metadata_mapping_file'});
     117
     118    if (!defined $mm_file)
    98119    {
    99120
    100121    my $msg = "MARCPlug ERROR: Can't locate mapping file \"" .
    101         $self->{'metadata_mapping'} . "\".\n    This file should be at $mm_file\n" .
     122        $self->{'metadata_mapping_file'} . "\".\n" .
    102123        "    No marc files can be processed.\n";
    103124
    … …  
    131152    }
    132153    close(MMIN);
     154
     155    $self->{'metadata_mapping'} = \@metadata_mapping;
    133156    }
    134157    else
    … …  
    137160    }
    138161
    139     $self->{'metadata_mapping'} = \@metadata_mapping;
     162
    140163
    141164    $self->SUPER::init(@_);

  • gsdl/trunk/perllib/plugins/MARCXMLPlug.pm

    r13496 r15018  
    4242          'desc' => "{MARCXMLPlug.metadata_mapping_file}",
    4343          'type' => "string",
     44          'deft' => "marctodc.txt",
    4445          'reqd' => "no" }];
    4546
    … …  
    6263   
    6364    $self->{'content'} = "";
     65    $self->{'xmlcontent'} = "";
    6466    $self->{'record_count'} = 1;
    6567    $self->{'language'} = "";
    … …  
    8385
    8486
     87sub _parse_marc_metadata_mapping
     88{
     89    my $self = shift(@_);
     90    my ($mm_file,$metadata_mapping) = @_;
     91
     92    my $outhandle = $self->{'outhandle'};
     93
     94    if (open(MMIN, "<$mm_file"))
     95    {
     96    my $l=0;
     97    my $line;
     98    while (defined($line=<MMIN>))
     99    {
     100        $l++;
     101        chomp $line;
     102        $line =~ s/#.*$//; # strip out any comments, including end of line
     103        next if ($line =~ m/^\s*$/);
     104        $line =~ s/\s+$//; # remove any white space at end of line
     105
     106        my $parse_error_count = 0;
     107        if ($line =~ m/^-(\d+)\s*$/) {
     108        # special "remove" rule syntax
     109        my $marc_info = $1;
     110        if (defined $metadata_mapping->{$marc_info}) {
     111            delete $metadata_mapping->{$marc_info};
     112        }
     113        else {
     114            print $outhandle "Parse Warning: Did not file pre-existing rule $marc_info to remove";
     115            print $outhandle " on line $l of $mm_file:\n";
     116            print $outhandle "  $line\n";
     117        }
     118        }
     119        elsif ($line =~ m/^(.*?)->\s*([\w\^]+)$/)
     120        {
     121        my $lhs = $1;
     122        my $gsdl_info = $2;
     123
     124        my @fields = split(/,\s*/,$lhs);
     125        my $f;
     126        while ($f  = shift (@fields)) {
     127            $f =~ s/\s+$//; # remove any white space at end of line
     128
     129            if ($f =~ m/^(\d+)\-(\d+)$/) {
     130            # number range => genrate number in range and
     131            # push on to array
     132            push(@fields,$1..$2);
     133            next;
     134            }
     135
     136            if ($f =~ m/^(\d+)((?:(?:\$|\^)\w)*)\s*$/) {
     137
     138            my $marc_info = $1;
     139            my $opt_sub_fields = $2;
     140
     141            if ($opt_sub_fields ne "") {           
     142                my @sub_fields = split(/\$|\^/,$opt_sub_fields);
     143                shift @sub_fields; # skip first entry, which is blank
     144
     145                foreach my $sub_field (@sub_fields) {
     146                $metadata_mapping->{$marc_info."\$".$sub_field} = $gsdl_info;
     147                }
     148            }
     149            else {
     150                # no subfields to worry about
     151                $marc_info =~ s/\^/\$/;
     152                $metadata_mapping->{$marc_info} = $gsdl_info;
     153            }
     154            }
     155            else {
     156            $parse_error_count++;
     157            }
     158        }
     159        }
     160        else
     161        {
     162        $parse_error_count++;
     163        }
     164
     165        if ($parse_error_count>0) {
     166       
     167        print $outhandle "Parse Error: $parse_error_count syntax error(s) on line $l of $mm_file:\n";
     168        print $outhandle "  $line\n";
     169        }
     170    }
     171    close(MMIN);
     172    }
     173    else
     174    {
     175    print STDERR "Unable to open $mm_file: $!\n";
     176    }
     177}
     178
     179
     180sub parse_marc_metadata_mapping
     181{
     182    my $self = shift(@_);
     183    my ($mm_file_or_files) = @_;
     184
     185    my $metadata_mapping = {};
     186
     187    if (ref ($mm_file_or_files) eq 'SCALAR') {
     188    my $mm_file = $mm_file_or_files;
     189    $self->_parse_marc_metadata_mapping($mm_file,$metadata_mapping);
     190    }
     191    else {
     192    my $mm_files = $mm_file_or_files;
     193   
     194    # Need to process files in reverse order.  This is so in the
     195    # case where we have both a "collect" and "main" version,
     196    # the "collect" one tops up the main one
     197
     198    my $mm_file;
     199    while ($mm_file = pop(@$mm_files)) {
     200        $self->_parse_marc_metadata_mapping($mm_file,$metadata_mapping);
     201    }
     202    }
     203
     204    return $metadata_mapping;
     205}
     206
     207
    85208sub init {
    86209    my $self = shift (@_);
    … …  
    93216    }
    94217
    95     my $metadata_mapping = {};
    96 
    97218    # read in the metadata mapping file
    98     my $mm_file = $self->{'metadata_mapping_file'};
    99 
    100     if (! defined $mm_file or $mm_file eq ""){
    101         $mm_file = &util::filename_cat( $ENV{'GSDLHOME'}, "etc","marctodc.txt" );
    102     $self->{'metadata_mapping_file'} = $mm_file;
    103     }
    104 
    105     if (!-e $mm_file)
     219    my $mm_files = &util::locate_config_files($self->{'metadata_mapping_file'});
     220
     221
     222    if (scalar(@$mm_files)==0)
    106223    {
    107224    my $msg = "MARCXMLPlug ERROR: Can't locate mapping file \"" .
    108         $self->{'metadata_mapping'} . "\".\n    This file should be at $mm_file\n" .
     225        $self->{'metadata_mapping_file'} . "\".\n " .
    109226        "    No marc files can be processed.\n";
    110227
    … …  
    115232    # If we exit here, then pluginfo.pl will exit too!
    116233    }
    117     elsif (open(MMIN, "<$mm_file"))
    118     {
    119     my $l=1;
    120     my $line;
    121     while (defined($line=<MMIN>))
    122     {
    123         chomp $line;
    124         if ($line =~ m/^(\d+\w?)\s*->\s*([\w\^]+)$/)
    125         {
    126         my $marc_info = $1;
    127         my $gsdl_info = $2;
    128         $metadata_mapping->{$marc_info} = $gsdl_info;
    129         }
    130         elsif ($line !~ m/^\#/       # allow comments (# in first column)
    131            && $line !~ m/^\s*$/) # allow blank lines
    132         {
    133         print $outhandle "Parse error on line $l of $mm_file:\n";
    134         print $outhandle "  \"$line\"\n";
    135         }
    136         $l++
    137     }
    138     close(MMIN);
    139     }
    140     else
    141     {
    142     print STDERR "Unable to open $mm_file: $!\n";
    143     }
    144 
    145     $self->{'metadata_mapping'} = $metadata_mapping;
     234    else {
     235    $self->{'metadata_mapping'} = $self->parse_marc_metadata_mapping($mm_files);
     236    }
     237
    146238
    147239    ##map { print STDERR $_."=>".$metadata_mapping->{$_}."\n"; } keys %$metadata_mapping;
    … …  
    191283    my $element = shift; 
    192284
    193     my $text =  $self->escape_text($_);
     285    my $text = $_;
     286    my $escaped_text =  $self->escape_text($_);
    194287 
    195288    $self->{'current_element'} = $element;
    … …  
    203296    }
    204297
    205  
     298
    206299    my $processor = $self->{'processor'};
    207300 
    … …  
    225318    $doc_obj->add_metadata($doc_obj->get_top_section(), "FileFormat", "XML");
    226319
    227     $doc_obj->set_OID();
    228     $self->set_OID($doc_obj, $doc_obj->get_OID() , $self->{'record_count'});
    229 
    230320    my $outhandle = $self->{'outhandle'};
    231321    print $outhandle "Record $self->{'record_count'} - MARCXMLPlug: processing $self->{'file'}\n" if $self->{'verbosity'} > 1;
    … …  
    254344   if ($element eq "record"){
    255345        $self->{'indent'} = 0;
     346        $self->{'content'} = "";
     347        $self->{'xmlcontent'} = "";
    256348    }
    257349    else {
    … …  
    264356    }
    265357   
    266    
    267    if ($element ne "collection"){
    268         $self->{'content'} .= "<br/>".$self->calculate_indent($self->{'indent'}).$text;
     358
     359    if ($element eq "collection") {
     360    # remember the full start tag for <collection ...>
     361    # This is needed to wrap around each <record> when generating its associate MARCXML file
     362
     363        $self->{'xmlcollectiontag'} = $text;
     364    }
     365    else {
     366        $self->{'content'} .= "<br/>" if ($element ne "record");
     367        $self->{'content'} .= $self->calculate_indent($self->{'indent'}).$escaped_text;
     368        $self->{'xmlcontent'} .= $text;
    269369   }
     370   
    270371}
    271372
    … …  
    275376    my $self = shift(@_);
    276377    my ($expat, $element) = @_;
    277     my $text =  $self->escape_text($_);
     378
     379    my $text = $_;
     380    my $escaped_text =  $self->escape_text($_);
    278381 
    279382    if ($element eq "record" and defined $self->{'doc_obj'}) {
    … …  
    281384    my $processor = $self->{'processor'};
    282385    my $doc_obj = $self->{'doc_obj'};
    283         $self->{'content'} .= "<br/>".$text;
     386        $self->{'content'} .= "<br/>".$escaped_text;
     387        $self->{'xmlcontent'} .= $text;
    284388     
     389
     390    my $top_section = $doc_obj->get_top_section();
     391
     392    my $tmp_marcxml_filename = &util::get_tmp_filename().".xml";
     393    if (open (XMLOUT,">$tmp_marcxml_filename")) {
     394
     395        print XMLOUT "<?xml-stylesheet type=\"text/xsl\" href=\"MARC21slim2English.xsl\"?>\n";     
     396        my $xml_content = $self->{'xmlcontent'};
     397
     398        $xml_content = $self->{'xmlcollectiontag'}.$xml_content."</collection>";
     399
     400        print XMLOUT $xml_content;
     401
     402        close(XMLOUT);
     403
     404        $doc_obj->associate_file($tmp_marcxml_filename,"marcxml.xml","text/xml", $top_section);
     405       
     406        # assicate xsl style file for presentation as HTML
     407        my $xsl_filename = &util::filename_cat($ENV{'GSDLHOME'},"etc","MARC21slim2English.xsl");
     408        $doc_obj->associate_file($xsl_filename,"MARC21slim2English.xsl","text/xml", $top_section);
     409
     410    }
     411    else {
     412        my $outhandle = $self->{'outhandle'};
     413        print $outhandle "Warning: Unable for write out associated MARCXML file $tmp_marcxml_filename\n";
     414    }
     415
     416    $self->add_OID($doc_obj,  $self->{'record_count'});
     417
    285418    $doc_obj->add_utf8_text($doc_obj->get_top_section(),$self->{'content'});
    286419        $processor->process($doc_obj);
    … …  
    288421        ##clean up
    289422    $self->{'content'} = ""; 
     423    $self->{'xmlcontent'} = ""; 
    290424    $self->{'doc_obj'} = undef;
    291425        return;
    … …  
    298432    my $doc_obj = $self->{'doc_obj'};
    299433
    300        ##map { print STDERR $_."=>".$marc_mapping->{$_}."\n"; } keys %$marc_mapping;
    301        ##map { print STDERR $_."=>".$metadata_mapping->{$_}."\n"; } keys %$metadata_mapping;
     434##  print STDERR "**** Marc Record\n";
     435##      map { print STDERR $_."=>".$marc_mapping->{$_}."\n"; } keys %$marc_mapping;
     436##  print STDERR "**** Metadata Mapping\n";
     437##      map { print STDERR $_."=>".$metadata_mapping->{$_}."\n"; } keys %$metadata_mapping;
     438
    302439
    303440    foreach my $marc_field (keys %$metadata_mapping){
    304         my ($meta_name,$meta_value);
     441
     442        ## test whether this field has subfield
     443        my $subfield = undef;
     444        if ($marc_field =~ /(\d\d\d)(?:\$|\^)?(\w)/){
     445        $marc_field = $1;
     446        $subfield = $2;
     447        }
     448
    305449        my $matched_field = $marc_mapping->{$marc_field};
    306         my $subfield = undef;
    307         if (defined $matched_field){
    308         ## test whether this field has subfield
    309         if ($marc_field =~ /\d\d\d(\w)/){
    310             $subfield = $1;
     450
     451        if (defined $matched_field) {
     452
     453        my $meta_name  = undef;
     454        my $meta_value = undef;
     455
     456        if (defined $subfield){
     457            $meta_name = $metadata_mapping->{$marc_field."\$".$subfield};
     458
     459            $meta_value = $matched_field->{$subfield};
     460           
     461            if (!defined $meta_value) {
     462            # record read in does not have the specified subfield
     463            next;
     464            }
    311465        }
    312         $meta_name = $metadata_mapping->{$marc_field};
    313 
    314         if (defined $subfield){
    315             my %mapped_subfield = {@$matched_field};
    316             $meta_value = $mapped_subfield{$subfield};
    317         }
    318         else{ ## get all values
    319             my $i =0;
    320             foreach my $value (@$matched_field){
    321             if ($i%2 != 0){
    322                 $meta_value .= $value." ";
    323             }
    324             $i++;
     466        else {
     467            $meta_name = $metadata_mapping->{$marc_field};
     468           
     469            # no subfield => get all the values
     470            foreach my $value (sort keys %{$matched_field}) {
     471            $meta_value .= $matched_field->{$value} ." ";
    325472            }
     473
    326474        }
    327475       
    … …  
    343491   if ($element eq "datafield"){
    344492       $self->{'indent'} = 1;
    345        $self->{'content'} .= "<br/>".$self->calculate_indent($self->{'indent'}).$text;
     493       $self->{'content'} .= "<br/>".$self->calculate_indent($self->{'indent'}).$escaped_text;
     494       $self->{'xmlcontent'} .= $text;
    346495   }
    347496    else{
    348     $self->{'content'} .= $text;   
     497    $self->{'content'} .= $escaped_text;   
     498    $self->{'xmlcontent'} .= $text;   
    349499    }
    350500     
    … …  
    354504sub set_OID {
    355505    my $self = shift (@_);
    356     my ($doc_obj, $id, $record_number) = @_;
    357    
     506    my ($doc_obj, $record_number) = @_;
     507   
     508    # first set it to generate hash value
     509    $doc_obj->set_OID();
     510
     511    # then top it up with an "r" + record-number suffix
     512    my $id = $doc_obj->get_OID();
    358513    $doc_obj->set_OID($id . "r" . $record_number);
    359514}
    … …  
    363518    my ($expat) = @_;
    364519
     520    my $text = $_;
     521    my $escaped_text = $self->escape_text($_);
     522
     523    # protect against & in raw text file
     524    $text =~ s/&/&amp;/g; # can't have & in raw form, even in 'raw' xml text
    365525
    366526    ## store the text of a marc code, for exapmle 520a=>A poem about....
    367527    if ($self->{'current_element'} eq "subfield" and $self->{'current_code'} ne "" and $_ ne "" ){
    368528    ##stored it in the marc_mapping
    369         push(@{$self->{'marc_mapping'}->{$self->{'current_tag'}}},$self->{'current_code'});
    370     push(@{$self->{'marc_mapping'}->{$self->{'current_tag'}}},$_);
     529
     530    my $current_tag  = $self->{'current_tag'};
     531    my $current_code = $self->{'current_code'};
     532
     533        $self->{'marc_mapping'}->{$current_tag}->{$current_code} .= $_;
     534
    371535    $self->{'current_code'} = "";
    372536    }
    373537   
    374     $self->{'content'} .=$self->escape_text($_);
     538    $self->{'content'} .= $escaped_text;
     539    $self->{'xmlcontent'} .= $text;
    375540   
    376541}
    … …  
    401566
    402567
     568sub unescape_text {
     569    my ($self,$text) = @_;
     570    # special characters in the xml encoding
     571    $text =~ s/&lt;/</g;
     572    $text =~ s/&gt;/>/g;
     573    $text =~ s/&quot;/\"/g;
     574
     575    $text =~ s/&/&amp;/g; # can't have & in raw form, even in unescaped xml!
     576
     577    return $text;
     578}
     579
     580
    4035811;
    404582

  • gsdl/trunk/perllib/plugins/PagedImgPlug.pm

    r14661 r15018  
    7171#<PagedDocument>
    7272#<Metadata name="Title">The Title of the entire document</Metadata>
    73 #<Page pagenum="1" imgfile="xxx.jpg" txtfile="yyy.jpg">
     73#<Page pagenum="1" imgfile="xxx.jpg" txtfile="yyy.txt">
    7474#<Metadata name="Title">The Title of this page</Metadata>
    7575#</Page>
    … …  
    257257    my $self = shift (@_);
    258258   
    259     return q^(?i)(\.jpe?g|\.gif|\.png|\.tif?f|\.te?xt|~)$^
     259    return q^(?i)(\.jpe?g|\.gif|\.png|\.tif?f|\.te?xt|\.html?|~)$^
    260260}
    261261
    … …  
    937937    $text =~ s/\\/\\\\/g; # macro language
    938938    $text =~ s/_/\\_/g; # macro language
    939     $text =~ s/</&lt;/g;
    940     $text =~ s/>/&gt;/g;
    941  
    942     # insert preformat tags and add text to document object
    943     $doc_obj->add_utf8_text($cursection, "<pre>\n$text\n</pre>");
     939
     940
     941    if ($text =~ m/<html.*?>\s*<head.*?>.*<\/head>\s*<body.*?>(.*)<\/body>\s*<\/html>\s*$/s) {
     942    # looks like HTML input
     943    # no need to escape < and > or put in <pre> tags
     944
     945    $text = $1;
     946
     947    # insert preformat tags and add text to document object
     948    $doc_obj->add_utf8_text($cursection, "$text");
     949    }
     950    else {
     951    $text =~ s/</&lt;/g;
     952    $text =~ s/>/&gt;/g;
     953
     954    # insert preformat tags and add text to document object
     955    $doc_obj->add_utf8_text($cursection, "<pre>\n$text\n</pre>");
     956    }
     957
    944958   
    945959    return 1;

  • gsdl/trunk/perllib/util.pm

    r15003 r15018  
    797797
    798798
     799sub locate_config_file
     800{
     801    my ($file) = @_;
     802
     803    my $locations = locate_config_files($file);
     804
     805    return shift @$locations; # returns undef if 'locations' is empty
     806}
     807
     808
     809sub locate_config_files
     810{
     811    my ($file) = @_;
     812
     813    my @locations = ();
     814
     815    if (-e $file) {
     816    # Clearly specified (most likely full filename)
     817    # No need to hunt in 'etc' directories, return value unchanged
     818    push(@locations,$file);
     819    }
     820    else {
     821    # Check for collection specific one before looking in global GSDL 'etc'
     822
     823    my $test_collect_etc_filename
     824        = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},"etc", $file);
     825
     826    if (-e $test_collect_etc_filename) {
     827        push(@locations,$test_collect_etc_filename);
     828    }
     829
     830    my $test_main_etc_filename
     831        = &util::filename_cat($ENV{'GSDLHOME'},"etc", $file);
     832    if (-e $test_main_etc_filename) {
     833        push(@locations,$test_main_etc_filename);
     834    }
     835    }
     836
     837    return \@locations;
     838}
     839
     840
    799841sub hyperlink_text
    800842{
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