--- rat/lonratedt.pm 2002/05/10 19:46:52 1.9 +++ rat/lonratedt.pm 2014/05/20 14:36:39 1.111 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # Edit Handler for RAT Maps # -# $Id: lonratedt.pm,v 1.9 2002/05/10 19:46:52 www Exp $ +# $Id: lonratedt.pm,v 1.111 2014/05/20 14:36:39 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -25,86 +25,46 @@ # # http://www.lon-capa.org/ # -# (TeX Content Handler -# -# 05/29/00,05/30 Gerd Kortemeyer) -# 7/1,6/30 Gerd Kortemeyer + package Apache::lonratedt; use strict; use Apache::Constants qw(:common); use Apache::lonnet; -use Apache::lonratsrv; - -my @links=(); -my @resources=(); - - -# Mapread read maps into global arrays @links and @resources, determines status - -sub mapread { - my $fn=shift; - - undef @links; - undef @resources; - - my ($outtext,$errtext)=&Apache::lonratsrv::loadmap($fn,''); - if ($errtext) { return ($errtext,2); } - -# -------------------------------------------------------------------- Read map - foreach (split(/\<\&\>/,$outtext)) { - my ($command,$number,$content)=split(/\<\:\>/,$_); - if ($command eq 'objcont') { - $resources[$number]=$content; - } - if ($command eq 'objlinks') { - $links[$number]=$content; - } - } -# ------------------------------------------------------- Is this a linear map? - my @starters=(); - my @endings=(); - undef @starters; - undef @endings; - - foreach (@links) { - if (defined($_)) { - my ($start,$end,$cond)=split(/\:/,$_); - if ((defined($starters[$start])) || (defined($endings[$end]))) { - return - ('Map too complex, has branchings. Use advanced editor.',1); - } - $starters[$start]=1; - $endings[$end]=1; - if ($cond) { - return - ('Map too complex, has conditions. Use advanced editor.',1); - } - } - - } - return $errtext; -} +use Apache::lonsequence(); +use Apache::loncommon(); +use Apache::lonlocal; +use LONCAPA::map(); +use File::Copy; +use LONCAPA; +use HTML::Entities(); # --------------------------------------------------------- Build up RAT screen sub ratedt { my ($r,$url)=@_; - $r->print(< - - - - - - - - - +'; + + my $start_page = + &Apache::loncommon::start_page('Edit Sequence',$js, + {'frameset' => 1, + 'add_entries' => \%layout}); + + my $end_page = + &Apache::loncommon::end_page({'frameset' => 1}); + $r->print(< + + +$end_page ENDDOCUMENT } @@ -112,26 +72,37 @@ ENDDOCUMENT sub buttons { my $adv=shift; - my $output='

'; + return $output.''; } -sub smpedt { - my ($r,$errtext)=@_; - my $buttons=&buttons(2); -# ----------------------------------------------------- Start simple RAT screen - $r->print(< - - - - -$buttons -$errtext -Group Search -Group Import -ENDSMPHEAD - $r->print( - ''); + var editbrowser; + function openbrowser(formname,elementname,only,omit) { + var url = '$resurl/?'; + if (editbrowser == null) { + url += 'launch=1&'; + } + url += 'inhibitmenu=yes&'; + url += 'catalogmode=interactive&'; + url += 'mode=edit&'; + url += 'form=' + formname + '&'; + if (only != null) { + url += 'only=' + only + '&'; + } + if (omit != null) { + url += 'omit=' + omit + '&'; + } + url += 'element=' + elementname + ''; + var title = 'Browser'; + var options = 'scrollbars=1,resizable=1,menubar=0,toolbar=1,location=1'; + options += ',width=700,height=600'; + editbrowser = open(url,title,options,'1'); + editbrowser.focus(); + } +ENDSCRIPT +} +# ------------------------------------------------------- Simple edit processor + +sub smpedt { + my ($r,$url,$errtext)=@_; + my $tmpfn=&Apache::lonnet::filelocation('',$url).'.tmp'; + my $targetmsg=''; + if ($env{'form.save'}) { + copy($tmpfn,&Apache::lonnet::filelocation('',$url)); + unlink($tmpfn); + my ($errtext,$fatal)= + &LONCAPA::map::mapread(&Apache::lonnet::filelocation('',$url),''); + unless ($fatal) { + $targetmsg=&Apache::lonhtmlcommon::confirm_success(&mt('Saved')); + } else { + $targetmsg=&Apache::lonhtmlcommon::confirm_success( + &mt('An error occurred while saving.'),1); + } + } + if ($env{'form.revert'}) { + $targetmsg=&Apache::lonhtmlcommon::confirm_success(&mt('Reverted')); + unlink($tmpfn); + my ($errtext,$fatal)= + &LONCAPA::map::mapread(&Apache::lonnet::filelocation('',$url),''); + } + $targetmsg = &Apache::loncommon::confirmwrapper($targetmsg) if ($targetmsg); + if (-e $tmpfn) { + $targetmsg= + '

' + .&mt('You are working with an unsaved version of your map.') + .'

'; + my ($errtext,$fatal)=&LONCAPA::map::mapread($tmpfn,''); + } + $errtext = '

'.$errtext.'

' if ($errtext); +# ---------------------------------------------------------- Process form input + + my @importselect=&Apache::loncommon::get_env_multiple('form.importsel'); + my @targetselect=&Apache::loncommon::get_env_multiple('form.target'); +# ============================================================ Process commands + + my $targetdetail=$env{'form.targetdetail'}; + my $importdetail=$env{'form.curimpdetail'}; + +# ---------------------------------------------------- Importing from groupsort + if (($env{'form.importdetail'}) && (!$env{'form.impfortarget'})) { + + $importdetail=''; + my @curimport=split(/\&/,$env{'form.curimpdetail'}); + + my $lastsel; + + if (defined($importselect[-1])) { + $lastsel=$importselect[-1]; + } else { + $lastsel=$#curimport; + } + + for (my $i=0;$i<=$lastsel;$i++) { + my ($name,$url)=split(/\=/,$curimport[$i]); + if ($url) { + $importdetail.='&'.$name.'='.$url; + } + } + + $importdetail.='&'.$env{'form.importdetail'}; + + for (my $i=$lastsel+1;$i<=$#curimport;$i++) { + my ($name,$url)=split(/\=/,$curimport[$i]); + if ($url) { + $importdetail.='&'.$name.'='.$url; + } + } + $importdetail=~s/\&+/\&/g; + $importdetail=~s/^\&//; + +# ------------------------------------------------------------------- Clear all + } elsif ($env{'form.clear'}) { + $importdetail=''; +# ------------------------------------------------------------ Discard selected + } elsif ($env{'form.discard'}) { + $importdetail=''; + my @curimport=split(/\&/,$env{'form.curimpdetail'}); + foreach (@importselect) { + $curimport[$_]=''; + } + for (my $i=0;$i<=$#curimport;$i++) { + my ($name,$url)=split(/\=/,$curimport[$i]); + if ($url) { + $importdetail.='&'.$name.'='.$url; + } + } +# --------------------------------------------------------- Loading another map + } elsif ($env{'form.loadmap'}) { + $importdetail=''; + my @curimport=split(/\&/,$env{'form.curimpdetail'}); + + my $lastsel; + + if (defined($importselect[-1])) { + $lastsel=$importselect[-1]; + } else { + $lastsel=$#curimport; + } + + for (my $i=0;$i<=$lastsel;$i++) { + my ($name,$url)=split(/\=/,$curimport[$i]); + if ($url) { + $importdetail.='&'.$name.'='.$url; + } + } + + foreach ( + &Apache::lonsequence::attemptread(&Apache::lonnet::filelocation('',$env{'form.importmap'}))) { + my ($name,$url)=split(/\:/,$_); + if ($url) { + $importdetail.='&'.&escape($name).'='. + &escape($url); + } + } + + for (my $i=$lastsel+1;$i<=$#curimport;$i++) { + my ($name,$url)=split(/\=/,$curimport[$i]); + if ($url) { + $importdetail.='&'.$name.'='.$url; + } + } + $importdetail=~s/\&+/\&/g; + $importdetail=~s/^\&//; + +# ------------------------------------------------ Groupimport/search to target + } elsif ($env{'form.importdetail'}) { + my $lastsel; + if (defined($targetselect[-1])) { + $lastsel=$targetselect[-1]; + } else { + $lastsel=$#LONCAPA::map::order+1; + } + &LONCAPA::map::pastetarget($lastsel,split(/\&/,$env{'form.importdetail'})); + &LONCAPA::map::storemap(&Apache::lonnet::filelocation('',$url)); +# ------------------------------------------------------------------------- Cut + } elsif (($env{'form.cut'}) || ($env{'form.copy'})) { + $importdetail=''; + my @curimport=split(/\&/,$env{'form.curimpdetail'}); + + my $lastsel; + + if (defined($importselect[-1])) { + $lastsel=$importselect[-1]; + } else { + $lastsel=$#curimport; + } + + for (my $i=0;$i<=$lastsel;$i++) { + my ($name,$url)=split(/\=/,$curimport[$i]); + if ($url) { + $importdetail.='&'.$name.'='.$url; + } + } + + foreach (@targetselect) { + my ($name,$url)=split(/\:/,$LONCAPA::map::resources[$LONCAPA::map::order[$_-1]]); + if ($url) { + $importdetail.='&'.&escape($name).'='. + &escape($url); + } + } + + for (my $i=$lastsel+1;$i<=$#curimport;$i++) { + my ($name,$url)=split(/\=/,$curimport[$i]); + if ($url) { + $importdetail.='&'.$name.'='.$url; + } + } + $importdetail=~s/\&+/\&/g; + $importdetail=~s/^\&//; + + if ($env{'form.cut'}) { + my @neworder=(); + for (my $i=0;$i<=$#LONCAPA::map::order;$i++) { + my $include=1; + foreach (@targetselect) { + if ($_-1==$i) { $include=0; } + } + if ($include) { + $neworder[$#neworder+1]=$LONCAPA::map::order[$i]; + } else { + &LONCAPA::map::makezombie($LONCAPA::map::order[$i]); + } + } + @LONCAPA::map::order=@neworder; + &LONCAPA::map::storemap(&Apache::lonnet::filelocation('',$url)); + } + +# ----------------------------------------------------------------------- Paste + } elsif ($env{'form.paste'}) { + my $lastsel; + if (defined($targetselect[-1])) { + $lastsel=$targetselect[-1]; + } else { + $lastsel=$#LONCAPA::map::order+1; + } + my @newsequence; + my @curimport=split(/\&/,$env{'form.curimpdetail'}); + foreach (@importselect) { + $newsequence[$#newsequence+1]=$curimport[$_]; + } + &LONCAPA::map::pastetarget($lastsel,@newsequence); + &LONCAPA::map::storemap(&Apache::lonnet::filelocation('',$url)); +# -------------------------------------------------------------------- Move up + } elsif ($env{'form.moveup'}) { + foreach (sort @targetselect) { + if ($_-1>0) { + my $movethis=$LONCAPA::map::order[$_-1]; + $LONCAPA::map::order[$_-1]=$LONCAPA::map::order[$_-2]; + $LONCAPA::map::order[$_-2]=$movethis; + } + } + &LONCAPA::map::storemap(&Apache::lonnet::filelocation('',$url)); +# ------------------------------------------------------------------ Move down + } elsif ($env{'form.movedown'}) { + foreach (reverse sort @targetselect) { + if ($_-1<$#LONCAPA::map::order) { + my $movethis=$LONCAPA::map::order[$_-1]; + $LONCAPA::map::order[$_-1]=$LONCAPA::map::order[$_]; + $LONCAPA::map::order[$_]=$movethis; + } + } + &LONCAPA::map::storemap(&Apache::lonnet::filelocation('',$url)); +# --------------------------------------------------------------------- Rename + } elsif ($env{'form.renameres'}) { + my $residx=$LONCAPA::map::order[$env{'form.renameidx'}-1]; + my ($name,@resrest)=split(/\:/,$LONCAPA::map::resources[$residx]); + $name=$env{'form.renametitle'}; + $name=~s/\:/\&colon\;/g; + $LONCAPA::map::resources[$residx]=$name.':'.join(':',@resrest); + &LONCAPA::map::storemap(&Apache::lonnet::filelocation('',$url)); + } +# ------------------------------------------------------------ Assemble windows + + my $idx=-1; + $importdetail='&'.$importdetail; + $importdetail=~s/^\&+/\&/; + my $importwindow= + ''. + join("\n",map { + $idx++; + if ($_) { + my ($name,$url)=split(/\=/,$_); + unless ($name) { $name=(split(/\//,$url))[-1]; } + unless ($name) { $name='EMPTY'; } + ''; + } + } split(/\&/,$importdetail)); + + $idx=0; + $targetdetail=''; + my $targetwindow= + ''. + join("\n",map { + my ($name,$url)=split(/\:/,$LONCAPA::map::resources[$_]); + unless ($name) { $name=(split(/\//,$url))[-1]; } + unless ($name) { $name='EMPTY'; } + $name = &LONCAPA::map::qtescape($name); + $url = &LONCAPA::map::qtescape($url); + $targetdetail.='&'.&escape($name).'='. + &escape($url); + $idx++; + $name = &HTML::Entities::encode($name,'\'"<>&'); + ''; + } @LONCAPA::map::order); + +# ----------------------------------------------------- Start simple RAT screen + my $editscript=&editscript('simple'); + + my %lt=&Apache::lonlocal::texthash( + 'sm' => 'Select Map', + 'sa' => 'Save', + 'nt' => 'New Title', + 'se' => 'Search', + 'im' => 'Import', + 'wl' => 'Import from Stored Links', + 'vi' => 'View', + 'lm' => 'Load Map', + 'ds' => 'Discard Selected', + 'ca' => 'Clear All', + 'ta' => 'Temporary Assembly Workspace', + 'rv' => 'Revert to Last Saved', + 'sa' => 'Save', + 'mu' => 'Move Up', + 'md' => 'Move Down', + 're' => 'Rename', + 'as' => 'after selected', + 'cs' => 'Cut selected', + 'ps' => 'Copy selected', + 'pas' => 'Paste after selected', + 'reco' => 'Recover Deleted' + ); + my $js=&Apache::lonhtmlcommon::scripttag(" + $editscript + + function openview(entry) { + var url=unescape((entry.split('='))[1]); + var parts=new Array; + if (url) { open(url,'cat'); } + } + + function viewtarget() { + openview((document.forms.simpleedit.targetdetail.value.split('&')) + [document.forms.simpleedit.target.selectedIndex]); + } + + function viewimport() { + openview((document.forms.simpleedit.curimpdetail.value.split('&')) + [document.forms.simpleedit.importsel.selectedIndex]); + } + + function renametarget() { + var selidx=document.forms.simpleedit.target.selectedIndex; + var entry=(document.forms.simpleedit.targetdetail.value.split('&')) + [selidx]; + var oldname=unescape((entry.split('='))[0]); + newtitle=prompt('$lt{'nt'}',oldname); + if (newtitle) { + document.forms.simpleedit.renameres.value=1; + document.forms.simpleedit.renameidx.value=selidx; + document.forms.simpleedit.renametitle.value=newtitle; + document.forms.simpleedit.submit(); + } + } +"); + + &Apache::lonhtmlcommon::clear_breadcrumbs(); + &Apache::lonhtmlcommon::add_breadcrumb({ + text => 'Authoring Space', + href => &Apache::loncommon::authorspace($url), + faq => 6, + bug => 'RAT', + help => 'Sequence_Simple_Editor_Creation',}); + &Apache::lonhtmlcommon::add_breadcrumb({ + text => 'RAT', + title => 'Resource Assembly Tool', + href => '',}); + &Apache::lonhtmlcommon::add_breadcrumb({ + text => 'Editor', + title => 'Simple Editor', + href => '',}); + + # Breadcrumbs are included by &start_page + my $start_page = &Apache::loncommon::start_page('Authoring Space',$js) + .&Apache::loncommon::head_subbox( + &Apache::loncommon::CSTR_pageheader() + .&buttons(2)); + my $end_page = &Apache::loncommon::end_page(); + + my $filetext = &mt('File: [_1]',''.$url.''); + $r->print(< + + + + + + + + + + + + + +

$lt{'ta'}		$filetext
+ + +$lt{'as'} + + + + + + + +		+ + + + + +$lt{'as'} + + + + + + + + +
+	+$lt{'cs'} + + +$lt{'ps'} + + +$lt{'pas'} + +	+

+ + + + + +$end_page +ENDSMPHEAD } +# ----------------------------------------------------------------- No such dir sub nodir { my ($r,$dir)=@_; - $dir=~s/^\/home\/\w+\/public\_html//; - $r->print(< - -

No such directory: $dir

- - -ENDNODIR + my $londocroot = $r->dir_config('lonDocRoot'); + my ($path) = ($dir =~ m{^\Q$londocroot\E?(/priv/[^/]+/[^/]+/)}); + $dir=~s{^\Q$londocroot/priv/\E[^/]+/[^/]+}{}; + my $brcrum = [{'href' => &Apache::loncommon::authorspace($path), + 'text' => 'Authoring Space'}]; +# {'href' => '', +# 'text' => 'No such directory'}]; + $r->print(&Apache::loncommon::start_page('Authoring Space', + undef, + {'bread_crumbs' => $brcrum,}) + .&Apache::loncommon::head_subbox( + &Apache::loncommon::CSTR_pageheader()) + .'

' + .&mt('No such directory: [_1]',''.$dir.'' + .'

' + .&Apache::loncommon::end_page()) + ); } # ---------------------------------------------------------------- View Handler sub viewmap { - my ($r,$adv)=@_; - $r->print(''.&buttons($adv)); - foreach (@resources) { + my ($r,$url,$adv,$errtext)=@_; + + &Apache::lonhtmlcommon::clear_breadcrumbs(); + &Apache::lonhtmlcommon::add_breadcrumb({ + text => 'Authoring Space', + href => &Apache::loncommon::authorspace($url), + faq => 6, + bug => 'RAT', + help => 'Sequence_Simple_Editor_Creation',}); + &Apache::lonhtmlcommon::add_breadcrumb({ + text => 'RAT', + title => 'Resource Assembly Tool', + href => '',}); + + # Breadcrumbs are included by &start_page + $r->print(&Apache::loncommon::start_page('Edit Content of a Map') + .&Apache::loncommon::head_subbox( + &Apache::loncommon::CSTR_pageheader() + .&buttons($adv)) + ); + if ($errtext) { + $r->print('

' + .$errtext + .'

' + .'

' + ); + } + my $idx=0; + $r->print('

'.$url.'

'); + if ($adv) { + $r->print('

' + .&mt('Map contents are not shown in order.') + .'

' + ); + } + $r->print(&Apache::loncommon::start_data_table() + .&Apache::loncommon::start_data_table_header_row() + .''.&mt('Type').'' + .''.&mt('Title in map').'' + .''.&mt('Filename of resource').'' + .''.&mt('Link to published resource').'' + .''.&mt('Link to resource in Authoring Space').'' + .&Apache::loncommon::end_data_table_header_row() + ); + foreach (&LONCAPA::map::attemptread(&Apache::lonnet::filelocation('',$url))) { if (defined($_)) { - my ($title,$url)=split(/\:/,$_); - $title=~s/\&colon\;/\:/g; - $url=~s/\&colon\;/\:/g; - unless ($title) { $title='Unknown'; } + $idx++; + my ($title,$url,$cond)=split(/\:/,$_); + if ($cond eq 'cond') { next; } + $title= &LONCAPA::map::qtescape($title); + $url = &LONCAPA::map::qtescape($url); + unless ($title) { $title=(split(/\//,$url))[-1] }; + unless ($title) { $title=''.&mt('Empty').''; } + my $resurl = $url; + my $resfilepath = $Apache::lonnet::perlvar{'lonDocRoot'}.$resurl; + my $filename; + if ($resurl =~ m#/([^/]+)$#) { + $filename = $1; + } + my $cstrurl = $resurl; + $cstrurl =~ s{^/res/}{/priv/}; + $r->print(&Apache::loncommon::start_data_table_row() + .'' + .'

' + .'' + .'' + .&HTML::Entities::encode(&LONCAPA::map::qtescape($title)) + .'' + .''.$filename.'' + .'' + ); if ($url) { - $r->print(''); + $r->print(''.&mt('Resource space').''); + } else { + $r->print(' '); } - $r->print(&Apache::lonratsrv::qtescape($title)); - if ($url) { $r->print(''); } - $r->print('
'); + $r->print(''); + if ($url) { + $r->print(''. + &mt('Authoring Space').''); + } else { + $r->print(' '); + } + $r->print('' + .&Apache::loncommon::end_data_table_row() + ); } } - $r->print(''); + $r->print(&Apache::loncommon::end_data_table()); + $r->print(&Apache::loncommon::end_page()); } # ================================================================ Main Handler sub handler { my $r=shift; - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; return OK if $r->header_only; - + my $target = $env{'form.grade_target'}; + if ($target eq 'meta') { + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + return OK; + } + my $url=$r->uri; my $fn=&Apache::lonnet::filelocation('',$url); @@ -279,8 +791,8 @@ sub handler { # ------------------------------------------- Determine which tools can be used my $adv=0; - unless ($ENV{'form.forcesmp'}) { - if ($ENV{'form.forceadv'}) { + unless ($env{'form.forcesmp'}) { + if ($env{'form.forceadv'}) { $adv=1; } elsif (my $fh=Apache::File->new($fn)) { my $allmap=join('',<$fh>); @@ -292,18 +804,18 @@ sub handler { my $fatal=0; # -------------------------------------------------------------------- Load map - ($errtext,$fatal)=&mapread($fn,$errtext); + ($errtext,$fatal)=&LONCAPA::map::mapread($fn,$errtext); if ($fatal==1) { $adv=1; } # ----------------------------------- adv==1 now means "graphical MUST be used" - if ($ENV{'form.forceadv'}) { + if ($env{'form.forceadv'}) { &ratedt($r,$url); - } elsif ($ENV{'form.forcesmp'}) { - &smpedt($r,$errtext); + } elsif ($env{'form.forcesmp'}) { + &smpedt($r,$url,$errtext); } else { - &viewmap($r,$adv); + &viewmap($r,$url,$adv,$errtext); } return OK; } @@ -313,7 +825,140 @@ __END__ +=pod + +=head1 NAME + +Apache::lonratedt: simple resource assembly tool + +=head1 SYNOPSIS + +lonratedt provides the routines and the handler for the Advanced + Resource Assembly Tool (RAT), and ties the various pieces together + with Javascript. + +=head1 OVERVIEW + +=head2 Map Representation + +=begin latex + +% +\begin{figure} +\begin{center}\includegraphics[% + width=0.55\paperwidth,bb = 0 0 200 100, draft, type=eps]{Map_Example}\end{center} + + +\caption{\label{Map_In_Advanced_Editor}Example of a Map in the Advanced Editor} +\end{figure} +% +\begin{figure} +\begin{lyxcode} + + +~~ + +~~~~ + +~~ + +~~~~ + +~~ + +~~~~ + +~~ + +~~~~ + +~~ + +~~~~ + +~~ + +~~~~ + +~~ + +~~ + +~~ + +~~ + +~~ +\end{lyxcode} + +\caption{\label{XML}XML for Map in Figure \ref{Map_In_Advanced_Editor}} +\end{figure} + +=end latex + +Fig. "XML for Map in Figure" shows the XML representation of the +resource map shown in Fig. "Example of a Map in the Advanced Editor", +which is the format in which maps are stored. In the figure, however, +additional graphical map layout information generated by the Advanced +Resource Assembly Tool is not displayed. This graphical information is +optional to re-generate the same graphical layout when the map is +brought up again in the Resource Assembly Tool, and is not needed for +any other system functionality. + +Maps can be generated by tools other than the Resource Assembly +Tool. In particular, an author might have some other representation of +a course sequence, which can be converted into a map using scripts. If +this map then were to be brought up in the Resource Assembly Tool, the +Tool would automatically generate a graphical layout for it. Each +entry of the map (resources, conditions and links) is stored in a +separate tag. + +Resources and conditionsX have to have unique ID +numbers. These numbers are automatically generated by the Resource +Assembly Tool when the entry is first created, or added to the entries +when a map generated outside the Resource Assembly Tool is first +retrieved. They can also be assigned by custom scripts or added in by +hand. + +In the XML example, entry 1 is the start resource of the map. When +this map is accessed, the source (src) URL of this tag will be the +first resource rendered. Entry 2 is the finish resource of this +map. This resource will be the last resource in the sequence of +resources. Entry 6 is a problem resource with the given URL and title, +as well as the priority "mandatory". Entry 19 is a condition, which is +used by the link between entries 6, the problem, and 9, a +sequence. I +=cut