[JENA-1864] Inconsistent Turtle serializers

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 3.14.0
• Fix Version/s: Jena 3.15.0

Environment

My Configuration:

OS: Ubuntu 18.04

java version "1.8.0_111"

javac 1.8.0_242

Jena Version: 3.14.0

• Assignee: Andy Seaborne
• Reporter: Viresh Gupta
• Created: 14/Mar/20 11:30
• Updated: 19/May/20 10:25
• Resolved: 31/Mar/20 07:21

Description

The turtle serializers provided for default model in Jena don't work as expected. Moreover, the docs lack on which methods to use in which case.

I found the following methods that seem to work:

1. model.write()  (A.ttl)
2. RDFWriter   (B.ttl)
3. RDFDataMgr  (C.ttl)

I'm providing a minimum working example along with the outputs using a sample turtle file from Turtle specifications (ggoblin.ttl – Example 1 from https://www.w3.org/TR/turtle/) in a gist: https://gist.github.com/virresh/5a28dc3adb1f40bf9070e2cb4ecfa90d

 

The issue:

1. "@base" directive is not printed when writing with the TURTLE_BLOCK and TURTLE_FLAT format in RDFWriter
2.  There is no way to provide "@base" inside the RDFDataMgr. Expected output was something like <#spiderman>
3. RDFDataMgr doesn't respect the prefix supplied, e.g I manually added prefix "@base", however, the output (C.ttl) still converts the relative entities into their absolute form, whereas I expected it to do something like base:#spiderman at the very least

 

I'll be happy to help with the issue if it doesn't fall into the "wont-fix" category.

Issue Links

• links to: GitHub Pull Request #719