> For the complete documentation index, see [llms.txt](https://technocoder.gitbook.io/lexica/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://technocoder.gitbook.io/lexica/reference/structures.md).

# Structures

Structures combine other data structures together. They are declared with the `data` keyword followed by the structure identifier and body. The trailing list separator is recommended but optional.

```
data Structure:
    field: Type,
```

If the body is on the same line, it will be terminated by a line break instead of a block close.

```
data Structure: field: Type
```

## Templates

Structures can have template type parameters. Template identifiers are preceded with the template token.

```
data Structure<$Type>:
    field: $Type,
```