Apps Platform. This document describes what Gmail contextual gadgets are, how to write them, how to install them, and how to diagnose and fix some common issues.
Gmail contextual gadgets can be listed for sale in the Google Apps Marketplace or used within in-house applications installed through the Google Apps console. Prerequisites This document assumes: Bringing more context to Gmail contextual gadgets. As part of the launch of Gmail contextual gadgets, Google released a set of predefined extractors that developers could use.
These extractors allow developers to match content within a single part of an email message, such as the subject, and use that content to display relevant information to the current user. Many Gmail contextual gadget developers have expressed a desire to match on more complex patterns than is possible with the predefined extractors. Gmail usages.