# Interface summary

## General

### org.simantics.Simantics

This static class can be used to obtain the active Session.

### org.simantics.db.Session

The Session interface represents the connection into the semantic database. Implements e.g. `RequestProcessor` and serves various special interfaces via the `getService`-method.

## Reading and writing

### org.simantics.db.RequestProcessor

`RequestProcessor` is a synchronous interface for making read queries and writes to the semantic database. Main implementations are `Session`, `ReadGraph` and `WriteGraph`.

### org.simantics.db.Read

The interface Read represents a query, which produces a single result. Main implementations are `ResourceRead*` and `*naryRead`.

### org.simantics.db.Write

The interface `Write` represents a modification into the semantic database. Main implementation is `WriteRequest`.