user interface - Saas customization api -

user interface - Saas customization api -

we creating saas web service application , wanted add together customization allow tenants & users add together custom attributes existing entity or (add custom entities , associate them custom attributes).

is possible?

how should web service , ui(consumer application) handle these custom attributes? json & xml

what should considered on db achieving same goal?

please explain technologies can accomplish , drawbacks of using enterprise level big tenant based application. open java or .net technologies , frameworks.

thank you

what should considered on db achieving same goal?

if looking implementation in java implement multi-tenant application. can have athena framework. http://athenasource.org/

for customized ui framework ;/ looking ui solution can customizable tenants.

api user-interface customization saas