What should the default settings be JSON-LD 1.0 or 1.1?
It is not a simple choice.
There is slightly pretty writing of JSON-LD 1.1 now - prefixes and
native types.
A new issue is
e.g. https://github.com/apache/jena/issues/1254
JSON-LD 1.1 is not completely backwards compatible with JSON-LD 1.0.
Current status:
There are two JSON-LD subsystems with their own language and format
constants as well as terms for the system "JSON-LD" settings. API code
can choose which it wishes to use. All the previous features of JSON-LD
1.0 writing are available this way.
The decision is what are the defaults for application/ld+json.
This affects Fuseki users where where isn't scope to have a switch
between 1.0 and 1.1.
In issues/1254, the reading client software isn't Jena so the
conservative choice of writing 1.0 while reading 1.1 does not really
work out.
The decision for Jena is when to switch.
JSON-LD 1.1 is becoming the norm.
It isn't practical to remain at JSON-LD 1.0 indefinitely.
I think we're at the point where we ought to switch reading and writing
to JSON-LD 1.1 unless we have examples/evidence where this is a problem.
Andy
On Fri, Mar 11, 2022 at 11:39 AM Andy Seaborne <[email protected]> wrote:
Jena has both JSON 1.0, provided by jsonld-java, and JSON-LD 1.1,
provided by Titanium.
What should the default settings be?
For parsing that means what is bound to "application/ld+json" and file
extension .jsonld.
For writing, it means what is setup for Lang.JSONLD.
This is two decisions - parsing and writing can be different.
But.
It is not so simple:
1/ For Java11, the default settings for java.net.http can't contact
schema.org.
This seems to only affect on a few (maybe one) Java 11 build version.
The latest Java11 available on Ubuntu works.
2/ Jena is writing JSON-LD 1.1 without much in the way of transformation
nor creating a @context from the RDF data. It prints full URIs; numbers
aren't abbreviated etc etc. so it not very pretty.
There is slightly pretty writing of JSON-LD 1.1 now - prefixes and
native types.
So there is "plain", no prefixes, no native types (and hence completely
faithly RDF), and "pretty" (JSON numbers).
Add issue 3:
JSON-LD 1.1 is not completely backwards compatible with JSON-LD 1.0.
e.g. https://github.com/apache/jena/issues/1254
