Most nurseries wil have some bench marks to work against - though for a one year old it will be very simple. The nurseries my children went to had lists of skills which may be achieved, say between 12 - 24 months, and so on. They kept it as a tick sheet in individual files with photographic evidence of the child's progress. Lovely thing to have when they left aged four.
When the children are older, what might be described as 'preschool', the nursery - which will be inspected so have to have assessment criteria - will probably conform to the Foundation Stage Curriculum which then continues through the reception year in primary school. (Key Stage One then commences in Years 1 & 2. Then Key Stage etc.)
For info on Foundation Stage see www.standards.dfes.gov.uk/primary/publications/foundation_stage
though a little early for your little one!
The nurseries my kids went to had parents' evenings when they went through their plan and explained their approach. We also discussed how this needed to be adapted, if necessary, for our childrens' particular needs.
I would just ask, in a none assertive, friendly way, what information they have available for parents.
Sorry. I rambled a it. Hope this helps!