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- - What's new
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+ - What's new
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What's new
-
-
- This page reports the newly implemented
-features of MathQL-1 that are not included in the ufficial
+
+ This page reports the newly implemented
+ features of MathQL-1 that are not included in the ufficial documentation yet.
-
-Changes and additions to MathQL-1 operators:
+
+ Changes and additions to MathQL-1 operators:
+
- - The add operator now accepts a syntax extension allowing
+
- The add operator now accepts a syntax extension allowing
to specify more than one explicit attribute group.
+
+
The syntax now is:
- <query> := "add" [ "distr" ]? [ <groups> |
-<avar> ] "in" <query>
-<groups> := <group> [ ";" <group> ]*
-<group> := <attribute> [ "," <attribute> ]*
-<attribute> := <value> "as" <path>
-
-Examples:
-the query add "1" as "a", "2" as "b" in subj "A" gives the result
+
+ <query> := "add" [ "distr" ]? [ <groups> | <avar>
+] "in" <query>
+ <groups> := <group> [ ";" <group> ]*
+ <group> := <attribute> [ "," <attribute> ]*
+ <attribute> := <value> "as" <path>
+
+ Examples:
+ the query add "1" as "a", "2" as "b" in subj "A" gives the result
"A" attr {"a"="1"; "b"="2"} while
-the query add "1" as "a"; "2" as "b" in subj "A" gives the result
+ the query add "1" as "a"; "2" as "b" in subj "A" gives the result
"A" attr {"a"="1"}, {"b"="2"}.
-
+
+
- - The new align operator takes an integer i (represented
-as a string), a multiple string value v and returns the same v
-where each string with length n < i is prefixed with i - n
+
- The new align operator takes an integer i (represented
+as a string), a multiple string value v and returns the same v
+where each string with length n < i is prefixed with i - n
spaces. The syntax of the add operator is:
+
+
<value> := "align" <string> "in" <value>
-
-This operators aligns strings containing numbers so that their alphabetic
+
+ This operators aligns strings containing numbers so that their alphabetic
order agrees with their numeric order.
-
-
+
+
- - The intersect operator now intersects the attribute groups
-of the mathing subject strings set-theoretically rather than making their
-"Cartesian product". This semantics reduces the computational costs and makes
+
- The intersect operator now intersects the attribute groups
+of the mathing subject strings set-theoretically rather than making their
+"Cartesian product". This semantics reduces the computational costs and makes
intersection the dual of union.
+
+
- - The property operator now accepts more than one isfalse
-clause to increase the complexity of the constraint condition used to filter
-the query results. This feature is exploited in the queries produced by the
- HELM query generator.
-
+ - The property operator now accepts more than one isfalse
+clause to increase the complexity of the constraint condition used to filter
+the raw query results. This feature is exploited in the queries produced
+by the HELM query generator.
+
+
+
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