Version Variables

Version are exposed during build using the {{versions.VERSIONING_SCHEME}} variable.

For example stack versioning variables are exposed as {{versions.stack}}.

Besides the current version, the following suffixes are available:

Using specialized mutation operators versions can be printed in any kind of ways.

Mutation operators also work correctly in links and code blocks, making them versatile for various documentation contexts.

Mutation operators can be used in both link URLs and link text:

[Download version {{version.stack | M.M}}](https://download.elastic.co/{{version.stack | M.M}}/elasticsearch.tar.gz)
[Latest major version](https://elastic.co/guide/en/elasticsearch/reference/{{version.stack | M}}/index.html)

Which renders as:

Download version 9.0 Latest major version

Mutation operators work in enhanced code blocks when subs=true is specified:

```bash subs=true
curl -X GET "localhost:9200/_cluster/health?v&pretty"
echo "Elasticsearch {{version.stack | M.M}} is running"
```

Which renders as:

curl -X GET "localhost:9200/_cluster/health?v&pretty"
echo "Elasticsearch 9.0 is running"

Mutation operators are robust and handle whitespace around the pipe character correctly:

This is dictated by the versions.yml configuration file

• stack
• ece
• ech
• eck
• ess
• self
• ecctl
• curator
• security
• apm_agent_android
• apm_agent_ios
• apm_agent_dotnet
• apm_agent_go
• apm_agent_java
• apm_agent_node
• apm_agent_php
• apm_agent_python
• apm_agent_ruby
• apm_agent_rum
• edot_ios
• edot_android
• edot_dotnet
• edot_java
• edot_node
• edot_php
• edot_python
• edot_cf_aws
• edot_collector

The following are available but should not be used. These map to serverless projects and have a fixed high version number.

• all

• ech

• ess (This is deprectated but was added for backwards-compatibility.)

• serverless

• elasticsearch

• observability