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---
#https://www.notion.so/n8n/Frontmatter-432c2b8dff1f43d4b1c8d20075510fe4
title: Programmatic-style parameters
description: A reference document listing the programmatic-style parameters of the node base file.
contentType: reference
---
# Programmatic-style parameters
These are the parameters available for [node base file](/integrations/creating-nodes/build/reference/node-base-files/index.md) of programmatic-style nodes.
This document gives short code snippets to help understand the code structure and concepts. For a full walk-through of building a node, including real-world code examples, refer to [Build a programmatic-style node](/integrations/creating-nodes/build/programmatic-style-node.md).
Programmatic-style nodes also use the `execute()` method. Refer to [Programmatic-style execute method](/integrations/creating-nodes/build/reference/node-base-files/programmatic-style-execute-method.md) for more information.
Refer to [Standard parameters](/integrations/creating-nodes/build/reference/node-base-files/standard-parameters.md) for parameters available to all nodes.
## `defaultVersion`
_Number_ | _Optional_
Use `defaultVersion` when using the full versioning approach.
n8n support two methods of node versioning. Refer to [Node versioning](/integrations/creating-nodes/build/reference/node-versioning.md) for more information.
## `methods` and `loadOptions`
_Object_ | _Optional_
Contains the `loadOptions` method for programmatic-style nodes. You can use this method to query the service to get user-specific settings (such as getting a user's email labels from Gmail), then return them and render them in the GUI so the user can include them in subsequent queries.
For example, n8n's [Gmail node](https://github.com/n8n-io/n8n/blob/master/packages/nodes-base/nodes/Google/Gmail/Gmail.node.ts) uses `loadOptions` to get all email labels:
```js
methods = {
loadOptions: {
// Get all the labels and display them
async getLabels(
this: ILoadOptionsFunctions,
): Promise<INodePropertyOptions[]> {
const returnData: INodePropertyOptions[] = [];
const labels = await googleApiRequestAllItems.call(
this,
'labels',
'GET',
'/gmail/v1/users/me/labels',
);
for (const label of labels) {
const labelName = label.name;
const labelId = label.id;
returnData.push({
name: labelName,
value: labelId,
});
}
return returnData;
},
},
};
```
## `version`
_Number_ or _Array_ | _Optional_
Use `version` when using the light versioning approach.
If you have one version of your node, this can be a number. If you want to support multiple versions, turn this into an array, containing numbers for each node version.
n8n support two methods of node versioning. Programmatic-style nodes can use either. Refer to [Node versioning](/integrations/creating-nodes/build/reference/node-versioning.md) for more information.
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