how to give parameters in url for getting json parse for both taxonomy terms AND nodes

Question

i created 2 nodes in Company CCK under taxonomy A, 2 nodes in Company CCk under taxonomy B. now i want to get a json parse for all the nodes in a taxonomy A.

I tried like this www.mywebsite/api/taxonomy_term?selectNodes&parameters[tid]=1 it gives the value of that taxonomy term but, i wont get nodes under that category . In what way the url should be framed for attaining values of nodes of a particular category(taxonomy) i.e i would like to filter the nodes of my choice.

so any one help me, Thanks in advance