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title: "Common Documents"
canonical: "https://docs.perspectium.com/space/Krypton/721063/Common%20Documents"
format: markdown
---
Common documents  are XML schemas that represent the fields that can be mapped from one application to another.  Bonding a Perspectium-supported application with ServiceNow requires the use of Common Documents. This page lays out instructions for the installation and implementation of Common Documents, with direct links to the various pages for each type of Common Document. Installation In order to implement common document formats, you must install the following update sets, in the same order as they are listed below.  Contact   Perspectium Support  to r equest download links for the required update sets: Perspectium for ServiceNow  <Release>   - This update set contains core Perspectium application functionality. Perspectium Common Endpoint  <Release>   - This update set which includes embedded table maps and common script includes that are used by all common document formats. The Common Endpoint update set only needs to be installed once before installing any of the common document format update sets. Perspectium Common <Object> <Release>   - These update sets contain each of the different common document processes. After installing the first two update sets, you can install each common document format update set of interest one by one. The  update set you will install for this step will depend on which record type you will integrate. For example, if you are integrating   incident   records, you will need to install   Perspectium Common Incident   update set. Click on any of the links in the  Table  column below to go to the page for that Common Document page.  - Finally, you must  run the Perspectium Finish Install scripts . Implementation The implementation of any common attachment format is symmetrical which means that the output, when consumed, should produce the same or similar records at the target. The implementation should also exhibit idempotent behavior which means that when the same document is consumed and processed repeatedly, the same result appears or is ignored because the results already exists. Common Document Types Finally, if you haven't already, explore the following pages for all the information you'll need on each Common Document type. Common Endpoint Common Attachment Common Catalog Task Common Change Common Incident Common Knowledge Common Problem Common Request Common Requested Item Common Task Common User And finally, learn about how to use Common Documents with ServiceNow Transform Maps .