Name : Attila Babits

E-mail : ababits&graphisoft.hu

MIME media type name : Model

MIME subtype name : Vendor Tree - vnd.gdl

Required parameters : none

Optional parameters :
none

Encoding considerations :
The GDL is a binary data which may contain one or more text tags.

The GDL (Geometric Description Language) is Graphisoft's parametric
object definition language. It is invented for ArchiCAD and used in many
other applications. The GDL defines a 3D model, a 2D model, property data,
a user interface and a parameter handler. All the above definitions
can be parametric.
A GDL object is a container for the GDL scripts, default parameters,
optional binary data and additonal information (eg. a preview image).

Transports not capable of handling binary data must use a suitable
encoding

Security considerations :
The GDL type data does not contain any kind of executable code macro
or batch) which runs on client machine.

Interoperability considerations :
None

Published specification :
The GDL (Geometric Description Language) is published as a
parametric object definition language for ArchiCAD by Graphisoft
(http://www.graphisoft.com).

Applications which use this media :
The 'GDL Object Web Plug-in' for Netscape and MS Internet Explorer -
a browser extension that can be found at 
http://www.graphisoft.com/products/gdl_plugin;
ArchiCAD; GDL Object Explorer (standalone application); GDL Object
Adapter (standalone application)

Additional information :

1. Magic number(s) :
2. File extension(s) : gdl,gsm,win,dor,lmp,rsm,msm,ism
3. Macintosh file type code : TEXT,GSYM,WSYM,DSYM,LAMP,RSYM,MSYM,ISYM

Person to contact for further information :

1. Name : Attila Babits
2. E-mail : ababits&graphisoft.hu

Intended usage : Common

Author/Change controller : Attila Babits