v1.1.18

• New optional isDescribedBy field in bblock.json (a single identifier or a list) to link a block, typically a schema, to the model block that describes it. It is published in register.json and in the register's RDF (as the IANA describedby relation) (c1af50a)
• dependsOn in register.json now always lists every direct dependency, including the targets of isProfileOf and isDescribedBy, which are also kept in their own fields. Viewers and other consumers should show the more specific relation when a pair appears under both (c1af50a)
• isProfileOf now counts for build order and circular-dependency warnings, and an isProfileOf pointing at a nonexistent block is now reported as an error instead of being silently ignored (c1af50a)

Full Changelog: v1.1.17...v1.1.18