Local part of prefixed name may not start with hyphen-minus (-) or full stop (.)

[sgoetz-brox]

test.ttl:

@prefix ex: <https://example.org/> .

<https://example.org/-10> a <https://example.org/Test> .

owl write test.ttl generates:

@prefix ex: <https://example.org/> .

ex:-10 a ex:Test .

If I’m not mistaken, the generated Turtle is invalid, because the local part of a prefixed name must not start with -.

(The same issue exists for ., and maybe also other characters.)

Allowed first character in the local part of a prefixed name

If I read it correctly, the local part may start with (PN_CHARS_U | ':' | [0-9] | PLX). Following the references, this seems to be the list of allowed start characters:

• _
• :
• % (followed by HEX HEX)
• \ (followed by one of: _ ~ . - ! $ & ' ( ) * + , ; = / ? # @ %)
• [0-9]
• [A-Z]
• [a-z]
• [#x00C0-#x00D6]
• [#x00D8-#x00F6]
• [#x00F8-#x02FF]
• [#x0370-#x037D]
• [#x037F-#x1FFF]
• [#x200C-#x200D]
• [#x2070-#x218F]
• [#x2C00-#x2FEF]
• [#x3001-#xD7FF]
• [#xF900-#xFDCF]
• [#xFDF0-#xFFFD]
• [#x10000-#xEFFFF]

[atextor]

Hi @sgoetz-brox, thanks for reporting!
From preliminarily scanning the given sections I think you're right. (I might have to concentrate a bit more though, since I've been laying down with fever the past couple days and still do)

[atextor]

Fixed in v1.2.3.