XML Feeds

An XML feed is a file or a data stream structured in XML format, used to exchange information between two systems: product catalogues, advertisements, stock levels, prices, etc.

Widely used in e-commerce and marketing integrations, it allows two applications to communicate in a standardised way even without a real-time API.

The XML feed in practice

Typical Use Cases

Product catalogues exported to Google Shopping, Amazon, Mirakl.
Stock feed between an ERP and an e-commerce site.
EDI exchanges between partners (orders, invoices).
Sitemaps XML for SEO.

Best practices

XML / XSD schemas to validate the structure.
Systematic UTF-8 encoding.
Compression (gzip) for large volumes.
Automated and scheduled generation (CRON, jobs).

Caveats

Volume - a feed of several hundred MB blocks naive tools; use a streaming parser (SAX) rather than DOM.
Encoding and special characters - primary cause of errors in production.
For new exchanges between modern APIs, JSON is generally more suitable.

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