An account is a subset of an entire accounting book. It stores a number of different transactions for multiple parties, that typically happened in a single event. An account is written from the perspective of the account issuer, as in credit is money that is earned by the issuer, and debit is money that they have paid out. The opening balance for this account. If a date is specified, then the whole account is not included, only items from the start date, inclusive. If the date is excluded, this is the opening balance at the start of the account. This may be excluded when a filter is used instead. A line on an invoice. The internal identifier for this line item. The internal identifier for the line item that corresponds to the other half of this line item. The account for which this item is associated with The account for which this item's complement is associated with Indicate that this item is linked to an invoice. The closing balance for this account. If a date is specified, then the whole account is not included, only items until the end date, inclusive. If the date is excluded, this is the closing balance at the current state of the account. This may be excluded when a filter is used instead. An invoice represents a number of items that are all associated with a single transaction with a single party. An invoice is written from the perspective of the invoiced party, as in credit is money that is received by the invoiced party, and debit is money that they have paid. The date and time that the invoice was issued at. This is also the tax point. The date that payment is due by. On the day after this date, this invoice is considered overdue. The parties involved in this invoice. A line on an invoice. Notes that will appear on the invoice. A payment lot may contain multiple payments made from one party to another. The date and time that the payment was made at. The parties involved in this invoice. Make a payment to a specific account. Note that this MUST be an accounts payable or accounts receivable account to be valid. A payment in a lot. Where has this payment come from, for example BACS, cash payment, etc. How much this payment is for. An optional external reference identifier to another service (which should be somehow obvious) that contains further details of this transaction. Other details associated with this payment. A party is an individial, company or group that is the subject of a transaction. The name of the other party. The address of the other party. The email address of the other party. The rate from the default currency to the specified currency, i.e. 1 of the default currency is equal to this amount of the specified currency. The ISO4217 currency code of this specific item. The OIDC subject of another user who can work with your accounts. The ISO4217 currency code of this specific item. The ISO4217 currency code to assume when none is explicitly specified An ISO4217 currency code