International Digital Publishing Forum

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The International Digital Publishing Forum (IDPF) is a trade and standardization organization committed to the development and dissemination of digital publishing.

The forum maintains several working groups that are responsible for 3 standards:

  1. Open Publication Structure (OPS)
  2. Open Packaging Format (OPF)
  3. Container Format (OCF)

The EPUB format for e-books is composed of these 3 standards .

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