template attribute definition possible bug?

[Peter Schober]

* Athanasios Douitsis <aduitsis at gmail.com> [2015-11-02 18:17]:
>                 <resolver:Dependency ref="attr1" />
>                 <resolver:Dependency ref="attr2" />
[...]
> Assuming that attr1=val1 and attr2=val2, when I run this example I get
> two(!!!) values:
> 
> val1:val1
> 
> and
> 
> val2:val2

What are "attr1" and "attr2" that you reference above?
If those ultimately lead to DataConnectors and each DataConnector
provides values for both attr1 and attr2 I would imagine the above to
happen.
-peter