> ## Documentation Index
> Fetch the complete documentation index at: https://docs.iso20022js.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Core types used in the payment system

## Overview

This page documents the core types used in our payment system. These types are essential for structuring payment instructions, defining parties involved in transactions, and specifying account and agent details.

### Payment Initiation

ISO200022 data models relevant to payment initation.

<CardGroup cols={2}>
  <Card title="Payment Instructions" href="/data-reference/payment-instruction" icon="file-invoice-dollar">
    Learn about the structure and types used for payment instructions
  </Card>

  <Card title="Parties" href="/data-reference/party" icon="users">
    Understand the types defining parties involved in transactions
  </Card>

  <Card title="Accounts" href="/data-reference/account" icon="piggy-bank">
    Explore the account types used in the payment system
  </Card>

  <Card title="Addresses" href="/data-reference/address" icon="map-pin">
    Discover the address types for various entities
  </Card>
</CardGroup>

### Cash Management

ISO200022 data models relevant to cash management.

<CardGroup cols={2}>
  <Card title="Statements" href="/data-reference/statement" icon="file-invoice-dollar">
    Learn about the structure and types used for statements
  </Card>

  <Card title="Balances" href="/data-reference/balance" icon="chart-simple">
    Explore the balance types used in a statement
  </Card>

  <Card title="Entries" href="/data-reference/entries" icon="money-bills">
    Understand the types used for entries in a statement
  </Card>

  <Card title="Transactions" href="/data-reference/transactions" icon="money-from-bracket">
    Explore the transaction types used in a statement
  </Card>
</CardGroup>