The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.
This specification attempts to create a standard for styling vector data across multiple clients.
Style files must be valid JSON.
Styles must have a version property equal to the current specification
version as a string.
Styles must have a buckets property as an object with mappings from
names to bucket properties.
Styles must have a layers property as an array.
Each bucket must have property filter that defines its filter from the dataset.