Direct attributes

Each network object is described by means of Visum attributes (direct attributes). The following types are differentiated as follows:

  • Input attributes (e.g. stop number) and
  • calculated attributes, which are also called output attributes (for example, the number of Passengers boarding at a stop)

Each Visum attribute is described as follows:

  • by a name (for example Number)
  • by a code (for example No.)
  • by an attribute identifier (attribute ID), which is always in English (for example No)

Note: The Attribute.xls file in the Doc folder of your Visum installation contains a complete list of all types of Visum network objects (which in connection with databases are also called tables) and of all attributes of each network object. There, you find the ID of each attribute, by which it can be identified clearly, its name and code as well as the description of what each attribute indicates.

The Table 14 shows an example of some input and output attributes of the link.

Table 14: Examples of input and output attributes at the link

Attribute

Input attribute

Calculated attribute

Number

X

 

TSysSet

X

 

Capacity PrT

X

 

Number of lanes

X

 

t0-PrTSys

 

X

tCur-PrTSys

 

X

Capacity PrT [Veh]

 

X

Saturation PuT seats

 

X

Passenger kilometers

 

X

Apart from predefined Visum attributes, for each network object type, user-defined attributes (User-defined attributes) can be created and edited. They are also direct attributes of the respective network object type and can be edited, saved, displayed graphically and in tables like Visum attributes.

In addition, for some network object types, it is possible to overwrite defined attribute values with other values for a limited time (Time-varying attributes).