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This is documentation of an archived release.
For documentation on the current version, please check Knowledge Base.

Orbit Resource Descriptor

Name	Orbit Resource Descriptor
Acronym	ORD
File Extension	*.ord

ORD stands for Orbit Resource Descriptor. This is an extension file that can accompany any spatial storage format.

Features

As the name says, it describes the resource and adds information to it. For example, it can add the following information:

Joined Tables: an extra attribute table file and link it to the resource attributes by specifying the relationship.
Scale Limits: it is possible to set a scale range (or only a max or min) where the layer is visible.
CRS: information about the coordinate system and datum
Naming : information about the user name, attributes containing hyperlinks, attributes containing annotations, primary fields, map tip fields.
Rules : information about attribute rules defined by a formula or a value list
Username: This is the name of the dataset as displayed in the Dataset List

Examples

Below are some ORD snippets that demonstrate how each type of information is stored.

Joined Tables

AttributeJoin=
 ModelId=1
 SourceTableName=D:\head_state.dbf
 TargetSetId=2
 TargetSetName=Head_State
 TargetSetDescription=
 JoinedField=
  AttributeSetName=Attributes
  AttributeName=NAME
  ColumnName=STATE
AttributeJoin=
 ModelId=1
 SourceTableName=<RESOURCELOCATION>\population.txt
 TargetSetId=3
 TargetSetName=Population
 TargetSetDescription=
 JoinedField=
  AttributeSetName=Attributes
  AttributeName=NAME
  ColumnName=STATE

Scale Limits

ScaleLimits=
 Smallest=1000.0
 Largest=50.0

DataSet CRS

DataSetCRS=4326

Naming

AttributeContentType=
 ModelId=1
  AttributeSetName=Attributes
   AttributeName=ID
    AttributeContentType=url-prefix
   AttributeName=Web
    AttributeContentType=url-prefix=http://;url;url-suffix=.com;active-hyperlink

PrimaryAttribute=
 ModelId=1
  AttributeSetName=Attributes
  AttributeName=ID

MapTipAttribute=
 ModelId=1
  AttributeSetName=Attributes
  AttributeName=NAME

Rules

Valuelist

AttributeConstraint=
 ModelId=1
  AttributeSetName=Attributes
   AttributeName=Type
    Rule=valuelist
    Value=CM
     Label=Constitutional monarchy
    Value=CR
     Label=Constitutional republic
    Value=AM
     Label=Absolute monarchy

Formula

AttributeConstraint=
 ModelId=1
  AttributeSetName=Attributes
   AttributeName=Area
    Rule=expression
    Expression=Area()

Attribute Dependent Valuelist

AttributeConstraint=
 ModelId=1
  AttributeSetName=Attributes
   AttributeName=MUNICIPALITY 
    Rule=attribute-dependent-valuelist 
    DependentAttribute=CITY 
    Value= 
      DependentAttributeValue=Antwerp 
      Value=Antwerpen 
      Value=Berchem 
      Value=Borgerhout 
    Value= 
      DependentAttributeValue=Brussels 
      Value=Anderlecht 
      Value=Oudergem 
      Value=Sint-Agatha-Berchem

Attribute Set Rules

ShouldHaveAttributeSets=
 ModelId=1
  AttributeSetName=Attributes
   ShouldHaveAttributeSets=true

Username

DataSetUserName=World Countries

AttributeSetUserNames=
 ModelId=1
  AttributeSetName=Attributes
   AttributeSetUserName=Attributes
DataSetUserName=World Countries
ModelUserNames=
 ModelId=1
  ModelUserName=Model
  ModelUserDescription=

Last modified:: 2019/03/25 11:36