# Namespace Usage Examples and Reference
This topic provides examples of referencing components, objects, fields, and so on, in Aura components code.
Examples are provided for the following.
- Components, events, and interfaces in your organization
- Custom objects in your organization
- Custom fields on standard and custom objects in your organization
- Server-side Apex controllers in your organization
- Dynamic creation of components in JavaScript
- Static resources in your organization
## Organizations with No Namespace Prefix Set
The following illustrates references to elements in your organization when your organization doesn’t have a namespace prefix set. References use the default namespace, `c`, where necessary.
| Referenced Item | Example |
| ------------------------------------------------------ | ----------------------------------------------------------------------------------------- |
| Component used in markup | `` |
| Component used in a system attribute | ` ``` |
| Apex controller | `` |
| Custom object in attribute data type | `` |
| Custom object or custom field in attribute defaults | See the example after this table. |
| Custom field in an expression | `` |
| Custom field in a JavaScript function | See the example after this table. |
| Component created dynamically in a JavaScript function | See the example after this table. |
| Interface comparison in a JavaScript function | `aCmp.isInstanceOf("c:myInterface")` |
| Event registration | `` |
| Event handler | `` |
| Explicit dependency | `` |
| Application event in a JavaScript function | `var updateEvent = $A.get("e.c:updateExpenseItem");` |
| Static resources | `` |
Example of a custom object or custom field in attribute defaults:
```html
```
Example of a custom field in a JavaScript function:
```javascript
updateTotal: function(component) {
…
for(var i = 0 ; i < expenses.length ; i++){
var exp = expenses[i];
total += exp.Amount__c;
}
…
}
```
Example of a component created dynamically in a JavaScript function:
```javascript
var myCmp = $A.createComponent("c:myComponent", {},
function(myCmp) { }
);
```
## Organizations with a Namespace Prefix
The following illustrates references to elements in your organization when your organization has set a namespace prefix. References use an example namespace `yournamespace`.
| Referenced Item | Example |
| ------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------- |
| Component used in markup | `` |
| Component used in a system attribute | ` ``` |
| Apex controller | `` |
| Custom object in attribute data type | `` |
| Custom object or custom field in attribute defaults | See the example after this table. |
| Custom field in an expression | `` |
| Custom field in a JavaScript function | See the example after this table. |
| Component created dynamically in a JavaScript function | See the example after this table. |
| Interface comparison in a JavaScript function | `aCmp.isInstanceOf("yournamespace:myInterface")` |
| Event registration | `` |
| Event handler | `` |
| Explicit dependency | `` |
| Application event in a JavaScript function | `var updateEvent = $A.get("e.yournamespace:updateExpenseItem");` |
| Static resources | `` |
Example of a custom object or custom field in attribute defaults:
```html
```
Example of a custom field in a JavaScript function:
```javascript
updateTotal: function(component) {
…
for(var i = 0 ; i < expenses.length ; i++){
var exp = expenses[i];
total += exp.yournamespace__Amount__c;
}
…
}
```
Example of a component created dynamically in a JavaScript function:
```javascript
var myCmp = $A.createComponent("yournamespace:myComponent",
{},
function(myCmp) { }
);
```