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Updated Node Design Guidelines (markdown)

knolleary
2014-10-29 15:03:22 -07:00
parent 56c47787e7
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Node-Design-Guidelines.md

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### Node msg properties
* [Node msg structure](https://github.com/node-red/node-red/wiki/Node-msg-Conventions)
### Messages
* [Message property conventions](https://github.com/node-red/node-red/wiki/Node-msg-Conventions)
### Nodes
There are three types of node.
- an **Input node** sits at the start of a flow. It is typically triggered by some external event occurring.
- a **Function node** sits in the middle of a flow. It performs actions based on the incoming messages and passes on the resulting messages. One sub-type of Function node is a **Query node** that is used to retrieve data from an external API, such as a database query or a web services call.
- an **Output node** sits at the end of a flow. It consumes the incoming messages and triggers an action.
---
Work in progress:
* [[Input node feature definitions]]
* [[Query node feature definitions]]
* [[Watch node feature definitions]]