> > > I talked to Markos and there are some more issues here.
> > >
> > > 1. The function should probably go into the static context instead of the
> > > dynamic context.
> > But the Static context doesn't have functions to access the external
> > variables, so if this function is to be implemented in the static context it
> > would actually be using several functions of the dynamic context to work.
> > Since the external variable are part of the Dynamic context isn't it better
> to
> > just leave them there?
> As I said, it doesn't belong there. If you want to have it in the dynamic
> context
> you should only invoke it after execution.
> I think you should use VarInfo* lookup_var(const store::Item* qname) const;
> VarInfo contains the type of the variable.
Oh that makes sense I will make it static context then.

> 
> >
> > > 2. It really depends on what you want to cast to. In general, the target
> > type
> > > for casting is a sequence type (e.g. node()*, or xs:string?). As already
> > > mentioned, this cannot be returned as an item other than a string. If you
> > did
> > > that, it pushes a lot of effort to the consumer because he needs to parse
> > the
> > > sequence-type. There are two alternatives:
> > >   - xqxq:variable-type-name($name as xs:QName) as xs:QName? which returns
> > the
> > > name of type (e.g. no node()*)
> > >   - xqxq:variable-sequence-type($name as xs:QName) as xs:string? which
> > returns
> > > the sequence type as a string.
> > >
> > > It really depends on exactly what the user needs. I would go with
> variable-
> > > type-name if that's sufficient for all FOTS use cases.
> > I will go ahead and make the change for it to return of a QName
> Double check with Sorin whether he really doesn't need the occurrence
> indicator for casting.

The current implementation does return the occurrence indicator
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