How to register a new namespace in Fedora after installation?

[Natkeeran]

When CLAW/Feodra is installed, the claw.cnd can be configured register prefix-namespaces in Fedora. However, it is not clear how to do that after installation. Also, how can one delete unused/incorrect prefix-namespaces.

References

• https://wiki.duraspace.org/display/FEDORA4x/Best+Practices+-+RDF+Namespaces
• https://groups.google.com/forum/#!msg/fedora-tech/rk8U4KCKWbc/2J6bZkP3AxwJ
• https://groups.google.com/forum/#!msg/fedora-tech/1F0paNOp9GY/lUHI9niwOpQJ

[dannylamb]

@Natkeeran It gets autoregistered the first time you declare it when ingesting. If a namespace prefix is declared in the RDF when you upload it via POST or PUT, it will get registered. If it's not, you get ns001, ns002, ns003 and so on for each new namespace.

[dannylamb]

Re-reading i see you ask a second question that I missed. TBH I'm not 100% on it, but IIRC there's not much you can do once it's registered.

[whikloj]

Just wanted to clarify that the prefix nsXXX just means that is how it appears in the short form, the actual full URI is still there. That prefix really means nothing and registering the additional prefixes in Fedora makes it look nicer but has no actual impact on functionality.

[whikloj]

Coming back to this in the discussion around the SQL object persistence PR.

We should stop using the claw.cnd as Fedora now allows dynamic prefix addition and stores most URIs as the full URI.
https://wiki.duraspace.org/display/FEDORA51/Best+Practices+-+RDF+Namespaces

We need to help people stop using the claw.cnd namespaced prefixes because once you use a prefix you have to keep it. So either people with the prefixes must always include the claw.cnd or they need to export and import into a new Fedora without that claw.cnd

[seth-shaw-unlv]

I'm all for using the namespace registry.

Although, if we updated ansible-role-fcrepo to use the custom namespaces, does that force using fedora 5.x? If so, then the default value fcrepo_version needs to bump up from 4.7.2 to a 5.x number.

[whikloj]

Hmmmm yes it might, and then all my 🗣 at @ruebot here was actually coming out of the other end 😊