# TOM (Tabular Object Model)
The Tabular Object Model (TOM) offers a programmatic approach to managing administrative tasks, including model creation, data import, refreshing, and role/permission assignments.
TOM provides access to native tabular metadata, such as **model**, **tables**, **columns**, and **relationships** objects. The object model tree provides an overview of how these components are interconnected.
### **Tabular object model hierarchy**
From a logical standpoint, all tabular objects constitute a tree structure, rooted in a **Model** descending from Database. It's worth noting that **Server** and **Database** aren't strictly tabular because they might represent a multidimensional database on a server operating in Multidimensional mode, or a lower-compatibility tabular model not utilizing tabular metadata for object definitions.
Except for **AttributeHierarchy**, **KPI**, and **LinguisticMetadata**, each child object can be part of a collection. For instance, the **Model** object contains a collection of **Table** objects (via the **Tables** property), where each **Table** object houses a collection of **Column** objects, and so forth.
The lowest level descendant in this hierarchy for any parent object is an **Annotation** object. This object can be employed to optionally expand the schema provided that the necessary code is implemented to manage it.
### **Tabular object model Graphical View**
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