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rapid application development

build your database app within minutes

build your db app within minutes

build your db app within minutes
RelaX means Relational eXtension and is a new data model based on Complex Objects
to enable Rapid Application Development & Rapid Prototyping
fast, efficient and user friendly
generate a database application with only structure definition.
no programming- or html-knowledge required

Rapid Application Development with RelaX-db

Rapid Application Development with RelaX-db

RelaX-db is a set of tools & libraries for the RelaX data model to enable Rapid Application Development and Rapid Prototyping



Define the tables and complex objects and generate the sql-ddl statements for various database systems with the "rxmodel"-tool.


define the form based on the model and generate the html-code for further refinement with the "rxgenerate"-tool


operate the final html-form with a comprehensive set of functions bundled in the "rxclient"-library


support the database functions and the file services for the AJAX-calls with the "rxserver"-components

See more on wikipedia



state of the art design and slim implementation come to a powerful system


RelaX-db generates a single page application with slim AJAX-calls. Users experience fast responses with a minimum of server interaction


The app-designer specifies the structure of the database, the complex objects for the functions and the structure of the form. After these steps the app is running and can be tested

user friendly

The system features numerous comfort features like master-detail-interaction, lookups, calculated fields, schema trekking and arbitrary query parameters


RelaX-db supports major browsers like Chrome, Firefox and IE. It interacts with ORACLE, SQL-Server and MySQL on the database side. You only need a Node-JS-installation for the server components

RelaX Data Model

RelaX Data Model

RelaX means Relational eXtension

The RelaX data model combines multiple tables of a relational model into a complex object. The following picture lists 4 complex objects:
ordr, article, cust and agr

complex objects

Edit Tables are tables, that can be updated. They form a tree in a master-detail-form like order-items

Complex objects are divided into two sections:


Edit Tables are tables, that can be updated. They form a tree in a master-detail-form like order-items


Each of the Edit Tables can have Lookup Tables in the form of a tree. Aliases allow lookups from different source tables

Rapid Application Development

Rapid Application Development

Supported Patterns

The structure of Complex Objects and corresponding User Interface Patterns enable Rapid Application Development with a minimum of declaration effort


Master detail operation is served for search results and edit pages. Object binding via keys is automatically done by the system.


Expand Collapse functions enable user friendly administration of deeply structured master-detail objects.


A navigation bar is automatically generated from the list of complex objects. Each complex object defines a navbar function.


Search and join logic of for the select statements is automatically generated from the structure of the relevant complex object.


Lookups enable comfort search options and key binding for alternative key fields. Lookups can be triggered by simple html-attributes.


Binding of an object to a lookup table can be achieved through lookups attributes. Attributes, which depends on the master are resolved automatically on change.


Calculated attributes can be used like singular database attributes. caculated attributes can be composed from different tables.


The system can execute user defined procedures for special attributes on client. Order and cardinality of operation is handled by the system.


Validation can be performed on data model definitions, with formulas or procedures

Dyn. navigation

Forms can be structured in pages and blocks. Model defined conditions control their visibility

Local Storage

Forms data for complex forms can be stored for later completion

Schema Trekking

Navigation between the objects/functions can be achieved through simple calls, e.g. from an order to the associated customer.

File Handling

Files can be treated as normal attributes and can be uploaded, downloaded and displayed in the web page.


The system sets master objects with active details to inactive on delete. After setting a customer to inactive, no more orders can be bound to this customer.


Changes on specific tables can be logged to a log table; this includes changes on file attributes.


User authentication is supported and secured against XSS- and CSRF-attacs. External authentication systems can be integrated.


Admins can assign roles for various RelaX-apps to the users. External authorization systems can be integrated.

Role definition

Role permissions can be defined for each complex object. Users cannot see or exucute functions they are not assigned to.


Forms can be executed without app and db server. Lookups can be executed on js arrays



Serverless execution

The following Forms are executed without application and database server. Lookups are executed via javascript objects. Store on server results in an error.

Business Registration / Gen

Family Pass / Gen




Introduction and Overview of the main characteristics

Sample Application

Description of the sample application "Order Management"

Navigation Bar & Search

Demo of Navigation Bar and Search Functions

Lookups, Resolve & Calculate

Demo of Lookups, Resolved and Calculated Attributes

Data Entry

Demo of Data Entry features

Schema Trekking

Schema Trekking enables navigation through the model

File Upload & Download

Demo of File Upload and Download functions

Inactive & Change Log

Demo of Inactive Objects and Change Log

Master / Detail

Display and Edit of Master/Detail Objects

Computed Attributes / Validation

Definition and Execution of Computed Attributes

Complex Attributes

Definition of Complex Attributes

Pages / Blocks

Use of Pages and Blocks in Forms

Lookups Advanced

Lookup Variants

Authentication / Authorization / Security

Security Features

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Contact Us

  +43 660 610 1789

Dipl. Ing. Franz Grandits
Schulgasse 24
A 7411 Markt Allhau