# Tools
> Error tools.
## Usage
```javascript
var tools = require( '@stdlib/error/tools' );
```
#### tools
Namespace containing error tools.
```javascript
var o = tools;
// returns {...}
```
The namespace contains the following:
- [`database()`][@stdlib/error/tools/database]: standard library error code database.
- [`fmtprodmsgFactory( [options] )`][@stdlib/error/tools/fmtprodmsg-factory]: return a `function` which formats an error message for production.
- [`fmtprodmsg( code, ...args )`][@stdlib/error/tools/fmtprodmsg]: format an error message for production.
- [`id2msg( id )`][@stdlib/error/tools/id2msg]: return an error message corresponding to a provided two-character error identifier.
- [`id2pkg( id )`][@stdlib/error/tools/id2pkg]: return the package name associated with a specified error identifier prefix.
- [`msg2id( msg )`][@stdlib/error/tools/msg2id]: return a two-character error identifier corresponding to a provided error message.
- [`pkg2id( pkg )`][@stdlib/error/tools/pkg2id]: return the error identifier prefix associated with a specified package name.
## Examples
```javascript
var objectKeys = require( '@stdlib/utils/keys' );
var tools = require( '@stdlib/error/tools' );
console.log( objectKeys( tools ) );
```
[@stdlib/error/tools/database]: https://github.com/stdlib-js/error/tree/main/tools/database
[@stdlib/error/tools/fmtprodmsg-factory]: https://github.com/stdlib-js/error/tree/main/tools/fmtprodmsg-factory
[@stdlib/error/tools/fmtprodmsg]: https://github.com/stdlib-js/error/tree/main/tools/fmtprodmsg
[@stdlib/error/tools/id2msg]: https://github.com/stdlib-js/error/tree/main/tools/id2msg
[@stdlib/error/tools/id2pkg]: https://github.com/stdlib-js/error/tree/main/tools/id2pkg
[@stdlib/error/tools/msg2id]: https://github.com/stdlib-js/error/tree/main/tools/msg2id
[@stdlib/error/tools/pkg2id]: https://github.com/stdlib-js/error/tree/main/tools/pkg2id