Apache Avro Specification

1. Schema declaration

   JSON schema representation and type names.

2. Primitive types

   null, boolean, int, long, float, double, bytes, string.

3. Complex types

   record, enum, array, map, union and fixed.

4. Logical types

   decimal, uuid, date, time and timestamp logical types.

5. Binary encoding

   Zigzag varints and field-order encoding.

6. JSON encoding

   JSON representation of Avro data.

7. Schema resolution

   Reader and writer schema compatibility rules.

8. Parsing canonical form

   Canonical schema form and fingerprints.

9. Object container files

   File header, sync markers and blocks.

10. Single-object encoding

    Magic bytes and schema fingerprint framing.

11. Protocol declaration and wire format

    RPC protocols with messages and errors.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.