---
title: "Reference overview"
sidebar_label: "Reference Overview"
description: "Complete language references for AML and AQL — syntax, types, functions, and error codes."
slug: /reference
---

This section is pure lookup material: syntax definitions, type signatures, function specs, and error codes for AML and AQL. For conceptual guides and how-tos, see [Analytics as Code](/as-code/aml/).

## AML Reference

[AML (Analytics Modeling Language)](/reference/aml/) is the declarative language for defining your semantic layer — models, fields, datasets, relationships, dashboards, and more.

- **[Overview](/reference/aml/)**: how the AML reference is organized and where to start
- **[Quick Reference](/reference/aml/examples)**: side-by-side examples for common objects
- **[Model](/reference/aml/model)**: table models and query models
- **[Fields](/reference/aml/field)**: dimensions and measures
- **[Dataset](/reference/aml/dataset)**: collections of models with relationships
- **[Dashboard](/reference/aml/dashboard)**: dashboard-as-code definitions
- **[Types](/reference/aml/types)**: the AML type system
- **[Programmable Constructs](/reference/aml/constant)**: constants, functions, modules, extend, partial

## AQL Reference

[AQL (Analytics Query Language)](/reference/aql/) is the expression language for querying AML models — used in metrics, filters, calculated fields, and dataset field definitions.

- **[Overview](/reference/aql/)**: how the AQL reference is organized
- **[Expressions](/reference/aql/expression)**: table, metric, and explore expressions
- **[Operators](/reference/aql/operator)**: comparison, arithmetic, logical, and pipe operators
- **[Types](/reference/aql/type-index)**: scalars, tables, dimensions, fields, and measures
- **[Functions](/reference/aql/function)**: table functions, LOD functions, time-based functions, window functions, and inline functions
- **[Functions Cheatsheet](/reference/aql/functions)**: every function in one scannable table
- **[Error Reference](/reference/aql/error-reference)**: error codes and how to fix them