What Versions of the Apache Sling Specification Do AEM 6.3 and 6.4 Implement?

Well, I am unable to edit my original question.  dan.klco​, your answer is obviously not incorrect.  I wish I could mark both answers correct, but the original one I accepted was the correct answer to my question.

dan.klco​, awesome of you to clarify things.  I understand how this post could confuse other readers, but I really was just looking for the "base" version of Sling that's supported by AEM 6.3 and 6.4.  The answer I accepted was perfect for our needs, but might cause others to jump to wrong conclusions.  Makes perfect sense how the AEM implementation is not exactly all Sling version 9 or 10.  We just needed to know, in general, which set of API docs to use for reference (e.g., we wouldn't want to use Sling version 3 API documentation).  It's difficult to clarify exactly what I was asking without a huge, overly detailed post that will cause many knowledgeable people to ignore a huge wall of text. 

It was obvious after the first couple of responses that this was a tough question to get answered without verbal communication, so my next step was to call Adobe support.  Fortunately, somebody (arunp99088702) posted the answer we needed really quickly.  Your post certainly adds helpful perspective on things, and fills in some blanks.  Thanks so much for everyone who took time to help.

I will update the original question text to help remove ambiguity that could be misinterpreted.

Perfect dan.klco !! I was about to say the same.

AEM is built based on the various 'Sling components' which will have its own versions and doesnt depend on the 'Sling Application' version.

Ref: Apache Sling :: Downloads

hey nesfel.aem​

I'm a member of the Apache Sling PMC, so I wanted to clear up a bit of a misunderstanding you seem to have.

Ratna Kumar​ and scottmacd80​ are absolutely on the right track. Sling's Launchpad release are not "implemented" by AEM. Launchpad (now called Starter) is an aggregator of the bundles making up Apache Sling at a particular point of time. AEM is similarly constructed and the releases of AEM will not exactly match up with any release of the Sling Launchpad / Starter. It is quite common for AEM to contain unreleased versions of the various sling dependencies because Adobe does not have the time to go through a full release cycle on Apache Sling to make their AEM release dates (these will be dependencies that end with odd numbers FYI) or to include dependencies that were released after the Sling Launchpad / Starter release.

As arunp99088702 has indicated Sling Launchpad 9 is closest to AEM 6.3 and Sling Launchpad 10 is closest to AEM 6.4, but they are not the same thing and this is especially true when you install Service Packs.

arunp99088702​ Perfect!  Thanks very much.

Hi,

According to AEM Reference Materials, they mentioned refer Apache Sling API 9 for 6.3 and Apache Sling API 10 for 6.4

Reference Materials (6.3)

Reference Materials (6.4)

So may be AEM 6.4 is implements Sling 10 frameworks.

Thanks

Arun

https://helpx.adobe.com/experience-manager/6-4/sites/developing/using/reference-materials.html

smacdonald2008​ and Ratna Kumar​, first thanks for your replies.  I tried to make it clear in the original post that I already know I can look at the various Sling bundles and versions in the web console.  It doesn't answer the question.

The documentation on the official Apache Sling site is written to cover a specific version of Sling, even though Sling has many pieces.  That's all I'm trying to determine--what version of Sling as referenced on the official Apache Sling site is implemented by AEM?  It's a single numeric version--either version 8, 9, or 10 for AEM 6.3 and 6.4.  An Adobe AEM Architect would know the answer to this question.

Here are the links to avoid any ambiguity:

https://sling.apache.org/apidocs/sling9/index.html

https://sling.apache.org/apidocs/sling10/index.html

Please let me know if this isn't the right place to ask this question.  If it isn't, I will find out and post the answer.

Hi,

Yes I agree with Scott. Sling versions - Its basically a combination of different API's.

That you can find in Felix console as Scott mentioned.

Thanks,

Ratna Kumar.

Using the Felix web console - you can get details about the SLing APIs - such as shown here:

There is not 1 UI that describes the SLing Version Its a combination of various APIs