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Anatomy
Site
Every Vasat microservice is a Site. A site is typically a representation of a group of servers with a common database and codebase. A Site has a unquie RSA keypair and its public key can be registered on any other site to establish trust. A site need not be web based. A standalone command line tool for example could represent a Site.
Site Service
A collection of code to perform a particular function within a site. Eg 'GIS capability' or 'User management'. A site service will typically contain data models, and where web based, routes.