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https://issues.apache.org/jira/browse/LUCENE-9890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17311352#comment-17311352
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Tomoko Uchida edited comment on LUCENE-9890 at 3/30/21, 10:10 AM:
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 [~gsmiller] thanks for your comments.

We could start from a case-by-case approach - choose some experimental APIs 
that look sufficiently stable, and propose to remove their marker to promote 
them to officially ( ? ) supported APIs, one by one. The main challenge there 
would be, I think, it's hard to give a formal guarantee to any APIs. Lucene is 
continuously evolved by volunteer based community without top-down control as 
you know, so from my perspective all of our APIs are under experimental status 
whether they are explicitly marked as "experimental" or not.

Maybe it's not a binary decision but gradual consensus, I hope we find out some 
different approach from explicit labeling to show the stability levels of the 
APIs. Introducing labels is easy but finding the rationale to change/remove 
them is hard as we see...


was (Author: tomoko uchida):
 [~gsmiller] thanks for your comments.

We could start from a case-by-case approach - choose some experimental APIs 
that look sufficiently stable, and propose to remove their marker to promote 
them to officially ( ? ) supported APIs, one by one. The main challenge there 
would be, I think, it's hard to give a formal guarantee to any APIs. Lucene is 
continuously evolved by volunteer based community without top-down control as 
you know, so from my perspective all of our APIs are under experimental status 
whether they are explicitly marked as "experimental" or not.

Maybe it's not a binary decision but gradual consensus, I hope we find out some 
different approach from explicit labeling to show the stability levels of the 
APIs. Introducing labels is easy but finding the rationale to change/remove 
them are hard as we see...

> Retire @lucene.experimental tag and enforce @since tag for public classes
> -------------------------------------------------------------------------
>
>                 Key: LUCENE-9890
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9890
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: general/javadocs
>            Reporter: Tomoko Uchida
>            Priority: Minor
>
> We have 800+ {{@lucene.experimental}} annotations in the main branch. Many of 
> those classes were created years ago and have been time-tested on various 
> setups, so may be able to be cleaned up.
> {code:java}
> lucene $ git grep lucene.experimental | wc -l
> 804
> {code}
> BTW, do we really need this annotation...?
>  The description of it says nothing about when we should remove it from the 
> javadocs: "lucene.experimental:a:WARNING: This API is experimental and might 
> change in incompatible ways in the next release."
>   



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