[DOC] Add X-Pack links to Elasticsearch Reference (#25164)

* [DOC] Add X-Pack links to Elasticsearch Reference

* [DOCS] Address alignment of attributes in Versions.asciidoc

docs/Versions.asciidoc

@@ -16,7 +16,7 @@ release-state can be: released | prerelease | unreleased
 :painless:        https://www.elastic.co/guide/en/elasticsearch/painless/master
 :plugins:         https://www.elastic.co/guide/en/elasticsearch/plugins/{branch}
 :javaclient:      https://www.elastic.co/guide/en/elasticsearch/client/java-api/{branch}
-:xpack:           https://www.elastic.co/guide/en/x-pack/{branch}
+:xpack-ref:       https://www.elastic.co/guide/en/x-pack/{branch}
 :logstash:        https://www.elastic.co/guide/en/logstash/{branch}
 :kibana:          https://www.elastic.co/guide/en/kibana/{branch}
 :issue:           https://github.com/elastic/elasticsearch/issues/
@@ -25,6 +25,13 @@ release-state can be: released | prerelease | unreleased
 :docker-image:    docker.elastic.co/elasticsearch/elasticsearch:{version}
 :plugin_url:      https://artifacts.elastic.co/downloads/elasticsearch-plugins
 
+:xpack:           X-Pack
+:xpackml:         X-Pack machine learning
+:ml:              machine learning
+:es:              Elasticsearch
+:kib:             Kibana
+
+:xes-repo-dir:    {docdir}/../../elasticsearch-extra/x-pack-elasticsearch/docs/en
 
 ///////
 Javadoc roots used to generate links from Painless's API reference

docs/reference/index-all.asciidoc

@@ -0,0 +1,6 @@
+[[elasticsearch-reference]]
+= Elasticsearch Reference
+
+:include-xpack:             true
+
+include::index-shared.asciidoc[]

docs/reference/index-shared.asciidoc

@@ -0,0 +1,45 @@
+
+include::../Versions.asciidoc[]
+
+
+include::getting-started.asciidoc[]
+
+include::setup.asciidoc[]
+
+include::migration/index.asciidoc[]
+
+include::api-conventions.asciidoc[]
+
+include::docs.asciidoc[]
+
+include::search.asciidoc[]
+
+include::aggregations.asciidoc[]
+
+include::indices.asciidoc[]
+
+include::cat.asciidoc[]
+
+include::cluster.asciidoc[]
+
+include::query-dsl.asciidoc[]
+
+include::mapping.asciidoc[]
+
+include::analysis.asciidoc[]
+
+include::modules.asciidoc[]
+
+include::index-modules.asciidoc[]
+
+include::ingest.asciidoc[]
+
+include::how-to.asciidoc[]
+
+include::testing.asciidoc[]
+
+include::glossary.asciidoc[]
+
+include::release-notes.asciidoc[]
+
+include::redirects.asciidoc[]

docs/reference/index.asciidoc

@@ -1,47 +1,4 @@
 [[elasticsearch-reference]]
 = Elasticsearch Reference
 
-include::../Versions.asciidoc[]
-
-
-include::getting-started.asciidoc[]
-
-include::setup.asciidoc[]
-
-include::migration/index.asciidoc[]
-
-include::api-conventions.asciidoc[]
-
-include::docs.asciidoc[]
-
-include::search.asciidoc[]
-
-include::aggregations.asciidoc[]
-
-include::indices.asciidoc[]
-
-include::cat.asciidoc[]
-
-include::cluster.asciidoc[]
-
-include::query-dsl.asciidoc[]
-
-include::mapping.asciidoc[]
-
-include::analysis.asciidoc[]
-
-include::modules.asciidoc[]
-
-include::index-modules.asciidoc[]
-
-include::ingest.asciidoc[]
-
-include::how-to.asciidoc[]
-
-include::testing.asciidoc[]
-
-include::glossary.asciidoc[]
-
-include::release-notes.asciidoc[]
-
-include::redirects.asciidoc[]
+include::index-shared.asciidoc[]

docs/reference/setup/install.asciidoc

@@ -29,7 +29,7 @@ Elasticsearch website or from our RPM repository.
 
 `docker`::
 
-An image is available for running Elasticsearch as a Docker container. It ships with {xpack}/index.html[X-Pack] pre-installed and may be downloaded from the Elastic Docker Registry.
+An image is available for running Elasticsearch as a Docker container. It ships with {xpack-ref}/index.html[X-Pack] pre-installed and may be downloaded from the Elastic Docker Registry.
 +
 <<docker>>
 

docs/reference/setup/install/docker.asciidoc

@@ -2,15 +2,15 @@
 === Install Elasticsearch with Docker
 
 Elasticsearch is also available as a Docker image.
-The image is built with {xpack}/index.html[X-Pack] and uses https://hub.docker.com/_/centos/[centos:7] as the base image.
+The image is built with {xpack-ref}/index.html[X-Pack] and uses https://hub.docker.com/_/centos/[centos:7] as the base image.
 The source code can be found on https://github.com/elastic/elasticsearch-docker/tree/{branch}[GitHub].
 
 ==== Security note
 
-NOTE: {xpack}/index.html[X-Pack] is preinstalled in this image.
-Please take a few minutes to familiarize yourself with {xpack}/security-getting-started.html[X-Pack Security] and how to change default passwords. The default password for the `elastic` user is `changeme`.
+NOTE: {xpack-ref}/index.html[X-Pack] is preinstalled in this image.
+Please take a few minutes to familiarize yourself with {xpack-ref}/security-getting-started.html[X-Pack Security] and how to change default passwords. The default password for the `elastic` user is `changeme`.
 
-NOTE: X-Pack includes a trial license for 30 days. After that, you can obtain one of the https://www.elastic.co/subscriptions[available subscriptions] or {xpack}/security-settings.html[disable Security]. The Basic license is free and includes the https://www.elastic.co/products/x-pack/monitoring[Monitoring] extension.
+NOTE: X-Pack includes a trial license for 30 days. After that, you can obtain one of the https://www.elastic.co/subscriptions[available subscriptions] or {xpack-ref}/security-settings.html[disable Security]. The Basic license is free and includes the https://www.elastic.co/products/x-pack/monitoring[Monitoring] extension.
 
 Obtaining Elasticsearch for Docker is as simple as issuing a +docker pull+ command against the Elastic Docker registry.