Schema to use.
Enables compatibility with JSON.parse behavior. Duplicate keys in a
mapping override values instead of throwing an error.
Maximum total number of keys processed by merge (<<) across one load
call. Set to -1 to disable the limit.
Maximum number of alias nodes (*ref) per document. Set to 0 to reject
all aliases, or to -1 for no limit.
Source text referenced by offsets in
events.