justin2004 commented on issue #3866:
URL: https://github.com/apache/jena/issues/3866#issuecomment-4263251791
> What if you make the bnodes variables as well?
@namedgraph
```
prefix u: <uri:>
construct {
u:a u:b ?b .
?b u:time ?then .
}
where {
bind(now() as ?now)
bind(if(bound(?then),bnode(), 1/0 ) as ?b)
}
```
it works but it is more verbose and i have to specify lots of intermediate
structure.
the `[ ]` notation in the construct head is _so_ close to doing the ideal
thing for terse conditional structure.
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