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What are Electronic Data Interchange standards?

EDI standards are agreed rules for structuring business documents so that one organisation’s system can understand another’s. They define the format and meaning of the data in documents such as purchase orders, order acknowledgements, despatch advice and invoices.

They do not remove the need for partner-specific setup. A standard provides a common language; each trading relationship still needs an implementation guide that confirms the required message types, versions, identifiers, fields, transport route and testing process.

Why EDI standards matter

Business documents contain information that must be interpreted consistently: buyer and supplier identifiers, product codes, quantities, prices, delivery locations, dates and references. An EDI standard gives those data elements a defined place and meaning so systems can validate and process them without manual re-keying.

That structure helps reduce avoidable errors, supports faster document processing and creates a clearer audit trail. It is especially valuable where orders, fulfilment and invoices move between retailers, suppliers, manufacturers, logistics providers and finance teams.

Common EDI standards

UN/EDIFACT: an international family of electronic business-message standards used across many industries and regions.
EANCOM: GS1 guidance for using EDIFACT in supply-chain and retail workflows.
TRADACOMS: a long-established UK retail and grocery standard that remains relevant in some trading relationships.
ANSI X12: a widely used North American standard, with transaction sets such as the 850 purchase order and 810 invoice.
Peppol BIS: specifications used for particular public-procurement and e-invoicing scenarios.

These standards are not interchangeable labels. Each has its own syntax, message definitions and implementation conventions. A trading partner may also use a subset, version or profile that differs from another partner using the same overall standard.

Standard, message and implementation guide

It helps to separate three connected ideas. The standard is the ruleset, such as EDIFACT or X12. The message is a document type within that ruleset, such as an order or invoice. The implementation guide is the trading partner’s practical instruction for how that message must be used in its own workflow.

For example, two retailers may both use EDIFACT purchase orders but require different supplier codes, product identifiers, delivery references, optional fields or validation rules. That is why an EDI connection should be planned against the current partner guide rather than assumed from the name of the standard alone.

How to choose the right EDI standard

In most cases, the trading partner decides. Start by confirming who you need to exchange documents with, which documents are in scope, the version or profile they require, the approved connection method and the test process. Then map those requirements to the ERP, warehouse, accounting or ecommerce system that will create and receive the business data.

A supplier connecting to one retailer may begin with a narrow order-to-invoice workflow. A larger business may need to support several standards and partner-specific variants across different regions or customers. The right solution should accommodate the agreed requirements while keeping exceptions visible to the teams responsible for operations and finance.

Where to verify EDI standards

Use primary sources when checking standards and profiles: GS1 EDI, UN/EDIFACT, ANSI X12 and Peppol BIS Billing. For a live connection, the trading partner’s current implementation and testing instructions remain the operational source of truth.