# Compilers Preferences

PDE validates and flags potential problems on plug-in, feature and update site manifest files, as well as extension point schemas.

Syntactic problems are flagged as errors, while the severity level for each potential semantic problem is customizable and can be set to Error, Warning or Ignore.

For more information, refer to the following documents:

- Plug-in Compiler Preferences
- Extension Point Schema Compiler Preferences
- Feature and Update Site Compiler Preferences

PDE Preferences