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Overview

The topology.xml is an mandatory configuration file when you are setting up an IFD-environment. This configuration file is used to configure the topology of a region.

The topology is defined by individual nodes. The topology can be viewed in the topology panel, which shows a block diagram of the topology, or in the forecast panel, which shows

a tree view of the topoloy. The behaviour of the forecast panel can also be configured in the topology-file. A workflow can be configured for a topology-node. By default the workflow will

run locally when the node is selected in the forecast panel. This can be switched off by setting the option enableAutoRun to false.

The topology.xml plays a central role in configuring an IFD-environment since it is used to configure the forecast panel which is the central panel in an IFD-environmentTo be able to give additional information to a parameter without creating lots of extra parameters, we introduced the feature of qualifiers. Qualifiers are used to define a unique time series, next to the locationId and parameterId. Examples are series where you want to derive the daily minimum, maximum and mean values of an observed series of water levels. The original series is a regular series with parameterId "H" and no qualifier, where the other series have  the same parameterId "H", but qualifiers like "min", "mean" and "max".

Configuration

Qualifier definition

Qualifiers are defined in the regionConfigFiles directory. An example looks like:

<?xml version="1.0" encoding="UTF-8"?>
<qualifiers <topology xmlns="http://www.wldelft.nl/fews"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://www.wldelft.nl/fews http://fews.wldelft.nl/schemas/version1.0/qualifierstopology.xsd">

                <qualifier<nodes id="ABRFC">

                              <nodes id="minNMWTX" name="minNMWTX">

                                             <workflowId>NMWTX_Forecast</workflowId>

                                             <node  <description>minimum</description>
 id="EGLN5" name="EAGLE NEST DAM">

                                                            <workflowId>EGLN5_Forecast</workflowId>

                                             </qualifier>node>

                                             <node <qualifier id="maxCMMN5" name="maxCIMARRON 4SW">

                                                            <previousNodeId>EGLN5</previousNodeId>

                                                             <description>maximum</description>
  </qualifier>
</qualifiers><workflowId>CMMN5_Forecast</workflowId>

                                             </node>

                                             <node id="CMRN5" name="CIMARRON">

<localRun>false</localRun>

                                                            <workflowId>CMRN5_Forecast</workflowId>

                                             </node>

Time Series

The most useful way is first to read all locations from the DBF into one locationSet, where all attributes are assigned.
See for example:

...