Name	Data Type	Discussion
InvoiceHeader	see below	One record per invoice
InvoiceTaxes	list of Tax	One record per tax on the invoice
InvoiceMilestones	list of Milestone	One record per milestone on the invoice
InvoiceTimeCards	list of TimeCard	One record per timecard on the invoice
InvoiceCostCards	list of CostCard	One record per costcard on the invoice
InvoicePrepayments	List of Prepayment	One record per engagement on the invoice
InvoiceEngagements	list of Engagement	One record per engagement that has time, cost, or milestones on the invoice
InvoiceProjects	list of Project	One record per project that has time or cost on the invoice
InvoiceClientUdfs	list of ClientUdf	These are the UDFs associated with the invoiced client
InvoiceRoles	list of Role	(added 2018-06-07) One record per role on the invoice
InvoiceUdfs	list of InvoiceUdf	UDFs for the invoice. One record per UDF.

InvoiceHeader

Name	Data Type	Discussion
InvoiceId	int	Internal identifier
InvoiceNumber	string(20)
DraftInvoiceNumber	string(20)
InvoiceStatus	string(1)
InvoiceDate	dateTime
InvoiceName	string
CurrencyName	string
CurrencyCode	string(3)
CultureName	string
PaymentTerms	string
TimeGrossAmtOption	string(1)
CostGrossAmtOption	string(1)
TimeBillingType	string(1)	<D>aily or <H>ourly
InvoiceTemplateName	string(10)
EngagementId	int	Internal ID. Null unless this invoice is an engagement invoice.
ProjectId	int	Internal ID. Null unless this invoice is a project invoice.
PurchaseOrderNumber	string
BillingInstructions	string
AddressAttention	string
AddressCompanyName	string
AddressLine1	string
AddressLine2	string
AddressCity	string
AddressStateOrProvince	string
AddressZipOrPostalCode	string
AddressCountry	string
ClientMessage	string(1000)	A per-invoice message to appear on the invoice. RTF is stripped out if present.
ClientId	int	Internal ID
ClientNumber	string
ClientName	string
CostCenterName	string
CostCenterReferenceSystemId	string
AdjustedRevenueAmountTotal	money
ClientAmountTotal	money
MilestoneAmountTotal	money
TaxAmountTotal	money
AppliedPrepaymentAmountTotal	money
InvoiceAmount	money

...

...

Name	Data Type	Discussion
EngagementId	int
EngagementName	string
EngagementCode	string
EngagementTypeName	string
EngagementTypeShortName	string
AppliedPrepaymentAmount	money
UnappliedPrepaymentAmount	money

...

...

...

Role

...

Name	Data Type	Discussion
ProjectRoleId	int
Name	string	role name
DataType	string	D=> : date I=> : int R=> : resource (int) T=> : text (string) Y=> : Yes/No (string) L=> : text list (string) S=> : stoplight
StringValue	string	string value of UDF
IntValue	int	int value of UDF
DateValue	date	date value of UDF
MonthlyString12Value	string	for stoplight UDFs
WeeklyString12Value	string	for stoplight UDFs
MonthlyString6Value	string	for stoplight UDFs
WeeklyString6Value	string	for stoplight UDFs

Name	Data Type	Discussion
InvoiceId	int
Name	string	UDF name
DataType	string	D: date I: int R: resource (int) T: text (string) Y: Yes/No (string) L: text list (string) S: stoplight
StringValue	string	string value of UDF
IntValue	int	int value of UDF
DatetimeValue	date	date value of UDF
ReferenceInfo	string	resource ID for resource type invoice UDF
MonthlyString12Value	string	for stoplight UDFs
WeeklyString12Value	string	for stoplight UDFs
MonthlyString6Value	string	for stoplight UDFs
WeeklyString6Value	string	for stoplight UDFs

...