ES2000
ES2000 is a software platform designed specifically for the construction industry (Errichter). It is a comprehensive management tool that helps construction companies streamline their operations, improve efficiency, and enhance collaboration.
There is a version for security installers, for building outfitters, for elevator constructors, for fire protection specialists, etc.

ES2000 is owned by Craftview. It is available in German and English.
The overview of the tables are here: https://manual.es2000.de/esoffice/1300/content/esoffice/faq/faq_tabellen_esoffice.htm#microcontent1
Overview
ES200 offers a range of features and modules to address various aspects of management of installation projects. These include:
- Project Management
- Ressource Planning
- CRM (Customer Relationship Management)
- Estimation and Quoting
- Accounting
Technical Details
Technology
ES2000 is an on-prem solution with a fat client. It also contains a phone and tablet app for field workers.
Data Access
ES2000 can be accessed via the database.
References
For client projects, see for example hbt. There, you will also find a reference guide with all the database tables.