}
function help()
{
- alert ("spiegazione del bottone selezionato");
+with (document.form1) {
+ if (selopt[0].checked)
+ alert ("Turns a list of strings which cannot have attributes (the [val]) in a list of strings which can have them, but initially has none (a [set]).");
+ if (selopt[1].checked)
+ alert ("Taken a list of posix regular expressions, 'pattern [val]' searches the HELM library for all the URIs which match with at least one of those and returns a [set] representing them.");
+ if (selopt[2].checked)
+ alert ("A [svar] represents a list of URIs with attributes.");
+ if (selopt[3].checked)
+ alert ("A [rvar] is a single URI with attributes.");
+ if (selopt[4].checked)
+ alert ("Parenthesis are employed to force precedence between operators.");
+ if (selopt[5].checked)
+ alert ("The [path] you must enter represents a relation; this production returns a [set] composed by the union of all the URIs which match the chosen relation in the [val] you will enter afterwards, without attributes. If you select 'inverse', you'll obtain a list of all the URIs for which the [val] matches the chosen relation, 'sub' and 'super' modify the result depending on the chosen relation and the last input box allows you to add attributes to the result.");
+ if (selopt[6].checked)
+ alert ("This production returns a [set] composed by all the URIs in the given [set] which match the condition in the given [boole].");
+ if (selopt[7].checked)
+ alert ("'Union' returns a [set] which is the union of the two given [set]; should an URI be present in each [set] with different attributes, it will be included in the result only once with all the attributes.\n'Intersect' returns a [set] which contains the cartesian product of the URIs listed in each given [set].\n'Diff' returns a [set] which contains the URIs found in the first given [set] but not in the second. Attributes are ignored.");
+ if (selopt[8].checked)
+ alert ("Allows you to assign a value to a [svar]");
+ if (selopt[9].checked)
+ alert ("Allows you to assign a value to a [vvar]");
+ }
}
function choice()
{