Read the properties from iaas blueprint on xaas blueprint

Hi,

i'm new on the VRO.

I'm trying to figure out how can i call a IAAS blueprint from XAAS blueprint.

I have some IAAS blueprint with properties i need (Like CPU, Memory, custom properties). The only thing that i found to list this properties is JSON code. I just want to use with VRO java script.

I want to display them and put more properties from the user input to run the blueprint.

Please help,

Thanks.