# Data Directives

## Data Definition

| Mnemonic | Syntax | Description |
|----------|--------|-------------|
| **DB** | `name: value1 [, value2, ...]` | Define bytes</br>*(byte aligned)*|
| **DH** | `name: value1 [, value2, ...]` | Define half-words</br>*(2 byte aligned)*|
| **DW** | `name: value1 [, value2, ...]` | Define words</br>*(4 byte aligned)*|

**Examples:**

```dsa
db message: "Hello World", 0, 0x20, 231
dh numbers: 1000, 2000, 3000
dw stack: 0x10000
```

**Notes:**

- All string literals are automatically *null-terminated*

## Memory Reservation

| Mnemonic | Syntax | Description |
|----------|--------|-------------|
| **RESB** | `name: size` | Reserve bytes |
| **RESH** | `name: size` | Reserve half-words |
| **RESW** | `name: size` | Reserve words |

**Examples:**

```dsa
resb buffer: 256    ; Reserve 256 bytes
resh array: 100     ; Reserve space for 100 half-words
resw heap: 1024     ; Reserve space for 1024 words
```

## Imports

| Mnemonic | Syntax | Description |
|----------|--------|-------------|
| **INCLUDE** | `module_name "path"` | Include module symbols |

[More details on the module System](../imports.md)