Sidecar File
An XMP Sidecar File is a file containing serialized metadata related to a document. Sub-optimal for obvious reasons, these are used by tools, including liblicense, when the file format does not support direct embedding.
See also: XMP Specification, p 36
Facts about Sidecar File
| Supports license url | true + |
| Supports more permissions | true + |
| Supports web statement | true + |
