> For the complete documentation index, see [llms.txt](https://docs.buildings.ability.abb/collection/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.buildings.ability.abb/collection/platform/alarms-rules-and-escalations/rule-chains/nodes.md).

# Nodes

## Nodes

Nodes connect a rule chain to data, actions, and system behavior.

Use nodes to read values, write values, and trigger actions.

### Data nodes

* [Get Data](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/get-data.md)
* [Get Aggregated Data](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/get-aggregated-data.md)
* [Post Data](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/post-data.md)
* [SQL Query](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/sql-query.md)

### Action nodes

* [Alarm](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/create-alarm.md)
* [Ticket](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/ticket.md)
* [Send Email](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/send-e-mail.md)
* [Send Report](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/send-report.md)
* [Script](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/script.md)

### Event and AI nodes

* [Rule](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/rule.md)
* [LLM Call](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/llm-call.md)
* [Send Email LLM](/collection/platform/alarms-rules-and-escalations/rule-chains/nodes/send-e-mail-llm.md)

For the full rule chain workflow, see [Configure Rule Chain](/collection/platform/alarms-rules-and-escalations/rule-chains/configure-rule-chain.md).


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