# 4 The NAMESPACE file

A NAMESPACE file defines the functions, classes, and methods that are imported into the namespace, and exported for users.

In the following section we describe what Bioconductor reviewers will be looking for in this file.

## 4.1 Function names

Exported functions should use camel case or underscoring and not include ., which indicates S3 dispatch.

## 4.2 Imported functions

Generally importFrom() is encouraged over importing an entire package. However, if there are many functions from a single package, import() can be acceptable.

## 4.3 Exported functions

Exporting all functions with exportPattern("^[[:alpha:]]+") is strongly discouraged. Functions and generics should be exported individually, for clarity and control.