structured-merge-diff/

Package fieldpath defines a way for referencing path elements (e.g., an index in an array, or a key in a map).

Package schema defines a targeted schema language which allows one to represent all the schema information necessary to perform "structured" merges and diffs.

Package typed contains logic for operating on values with given schemas.

Package value defines types for an in-memory representation of yaml or json objects, organized for convenient comparison with a schema (as defined by the sibling schema package).