swish_projection:projection/1

Specify the result variables. Using projection/1 at the start of a query specifies which variables are part of the result set, in what order they are displayed and, optionally, whether the results must be ordered on one or more variables or the solutions should be distinct. Each element of Spec is one of the following:

Var

Include Var in the result. Var must appear in the remainder of the body.

Var:Annotation

As Var, respecting Annotation. Valid annotations are below. Annotations may be abbreviated, e.g. asc, desc

ascending: Order solutions in ascending order.
descending: Order solutions is descending order
distinct: Remove duplicates wrt. this argument.
AnnA + AnnB: Multiple annotations

+ Var

Equivalent to Var:ascending

- Var

Equivalent to Var:descending

If ordering is specified for multiple variables, the result set is ordered starting with the left-most variable for which ordering is defined.