What is EDI (Electronic Data Interchange)? | Definition & Guide
EDI (Electronic Data Interchange) is the standardized electronic exchange of business documents — purchase orders, invoices, advance ship notices, and payment remittances — between trading partners using structured formats like ANSI X12 and EDIFACT. EDI remains the backbone of B2B ecommerce order processing for large retailers, distributors, and manufacturers despite the rise of API-based integrations.
Definition
EDI (Electronic Data Interchange) is the standardized electronic exchange of business documents between trading partners using structured formats — primarily ANSI X12 (dominant in North America) and EDIFACT (used internationally). Core document types include purchase orders (EDI 850), invoices (EDI 810), advance ship notices (EDI 856), and functional acknowledgments (EDI 997). Rather than emailing PDFs or faxing paper documents, EDI transmits structured data that flows directly into receiving systems for automated processing. Platforms like SPS Commerce, TrueCommerce, and Cleo handle EDI translation, transmission, and monitoring for B2B ecommerce operations at manufacturers, distributors, and wholesalers.
Why It Matters
For B2B ecommerce operations selling to large retailers, distributors, or government entities, EDI compliance is non-negotiable. Walmart, Amazon Business, Target, Home Depot, and most major retailers mandate EDI for purchase orders, invoicing, and shipping notifications. A supplier that cannot process EDI documents cannot sell through these channels. Most Fortune 500 companies require EDI from their suppliers.
Beyond compliance, EDI reduces order processing costs by eliminating manual data entry. A distributor processing 500 purchase orders per week through manual entry (reading emails, keying orders into an ERP) faces labor costs, error rates, and processing delays that EDI eliminates. SPS Commerce reports that EDI reduces order processing costs by 35-50% compared to manual methods, with error rates dropping from 3-5% (manual) to under 1% (automated EDI).
The tradeoff is that EDI is a legacy standard with significant implementation overhead. The X12 specification is complex, each trading partner may have unique mapping requirements (Walmart's EDI specifications differ from Target's), and maintaining EDI connections across dozens of trading partners requires ongoing technical resources. Newer API-based alternatives are emerging, but the installed base of EDI is so large that B2B ecommerce operations will need to support EDI for the foreseeable future — even as they adopt modern APIs for newer trading partners.
How It Works
EDI systems in B2B ecommerce operate through four components:
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Document mapping and translation — Each EDI document type follows a structured format with segments, elements, and qualifiers that encode business data. An 850 purchase order contains buyer identification, ship-to address, line items with product IDs and quantities, pricing, and delivery dates. The challenge is that each trading partner may use different qualifiers, optional segments, and business rules within the same document standard. SPS Commerce and TrueCommerce maintain pre-built maps for thousands of trading partners, translating between the trading partner's EDI format and the supplier's ERP or ecommerce system format.
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Transmission protocols — EDI documents travel between trading partners through several transmission methods. AS2 (Applicability Statement 2) is the most common for large retailer compliance, encrypting documents and providing receipt confirmation. SFTP (Secure File Transfer Protocol) handles batch file exchange. VAN (Value Added Network) providers like SPS Commerce and OpenText act as intermediaries, receiving documents from one partner, routing them to the other, and providing tracking and error handling. Each trading partner specifies their preferred transmission method during onboarding.
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ERP and ecommerce integration — Inbound EDI documents (purchase orders from buyers) need to flow into the supplier's order management system — typically an ERP like NetSuite, SAP Business One, or Microsoft Dynamics. Outbound documents (invoices, ship notices) need to generate automatically when orders are invoiced and shipped. Cleo and TrueCommerce provide integration platforms that connect EDI translation to ERP systems, automating the end-to-end document flow. For ecommerce platforms, BigCommerce and Shopify Plus connect to EDI through middleware partners rather than native EDI capabilities.
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Compliance monitoring and error handling — Trading partners enforce EDI compliance through chargebacks and scorecards. Walmart's OTIF (On-Time, In-Full) program penalizes suppliers for late shipments; Amazon Business tracks ASN accuracy. EDI errors — missing segments, incorrect product IDs, formatting issues — result in rejected documents that delay order processing. SPS Commerce provides compliance dashboards that monitor document acceptance rates, flag errors before they reach trading partners, and track performance against each partner's requirements. Proactive compliance monitoring prevents the chargebacks that erode supplier margins.
EDI (Electronic Data Interchange) and SEO/AEO
We include EDI and B2B document exchange terminology in our ecommerce SEO content strategy because operations leaders searching for EDI topics are managing complex B2B trading relationships and evaluating their digital commerce infrastructure. This is a highly specialized audience — typically at manufacturers and distributors — whose search behavior signals infrastructure investment decisions. Content that demonstrates fluency in document standards, trading partner compliance, and ERP integration captures B2B ecommerce buyers that general marketing content misses entirely.