In this article you understand some of the basics fabrics/terminology used in SLA, i.e. Entities, Event Classes and Event Types. It is important for you to understand the variables within SLA engine which influence whether an accounting entry needs to be generated for a specific event within subledger like Payables or Receivables. For example in Procurement, there may be a need to generate accounting whenever a Purchase Order is encumbered. In case of SLA, the activity of "Encumbrance" against a Purchase Order is known as Event Type.
Likewise when a Payables Invoice is Validated, then you may want to create an accounting entry. In this case the "Invoice Validation" is an "Event Type". And your accounting rules for Invoice Validation will be attached against this specific "Event Type".For Payables, an INVOICE transaction and a PAYMENT transactions are known as Entities within SLA.
Entities can be subdivided into various "Event Classes", for example Credit Memo, Debit Memo, Expense Reports, Invoices etc.
Further to this, against the Event classes we define Event Types, for example, whenever your Invoice is validated or cancelled or adjusted, you may want some specific accounts in the General Ledger to be impacted. Event types are therefore the types/list of events against transactions which you wish to account for in General Ledger.
This is explained in the diagram below.
Each entity is identified by unique identifier or primary key from the underlying tables.