Commands given between backquotes (` ... `) are executed in a Bourne shell. The standard output of the command is returned in string1
Prototype
string <-- ` string2 `
Interactive examples
element DATE content: `date`; <DATE> Sun Jun 16 18:12:50 WET DST 1997 </DATE>global $files = split (`ls`); text($files, "\n");countries.sgml dates.sgml exemple-DTD.sgml myfile-ces.sgml select if gi(first within file $f) ne CESHEADER then "Warning: '" . $f . "' has no header\n" from $f in $files ;Warning: 'countries.sgml' has no header Warning: 'dates.sgml' has no header Warning: 'exemple-DTD.sgml' has no headerExample as a script
# put the directory content in list $files global $files = split(`ls -l *.sgml`); # for each file, output an element with # 'filename' in content, and # 'mode', 'owner' and 'group' in attributes element FILELIST attr: DIRECTORY = `pwd` content: ( select ( let $s = split($l, " +") in ( element FILE attr: { MODE = $s[1], OWNER = $s[3], GROUP = $s[4] } content: $s[9] ) ) from $l in $files ) ;Result:
<FILELIST DIRECTORY="/MtSgmlQL/examples"> <FILE MODE="-rw-r--r--" OWNER="sgmlql" GROUP="multext"> countries.sgml </FILE><FILE MODE="-rw-r--r--" OWNER="sgmlql" GROUP="multext"> dates.sgml </FILE><FILE MODE="-rw-r--r--" OWNER="sgmlql" GROUP="multext"> exemple-DTD.sgml </FILE><FILE MODE="-rw-r--r--" OWNER="sgmlql" GROUP="multext"> myfile-ces.sgml </FILE></FILELIST>