Adding a VDL View to the Example App

Having declared a view in the cfile, you must create a related VDL file to contain the user interface elements—Xpress Insight expects this to be stored in the client_resources directory.

Declare your first VDL view by changing the cfile ( foliodata.xml) so that it now looks like:

<?xml version="1.0" encoding="UTF-8"?>
<model-companion
xmlns="http://www.fico.com/xpress/optimization-modeler/model-companion"
version="3.0">
<client>
  <view-group title="Portfolio Optimization">
    <vdl-view title="Portfolio" path="foliodata.vdl"></vdl-view>
  </view-group>
</client>
</model-companion>

Note how the <vdl-view> element is contained within the <view-group> element, that it has a title called Portfolio Optimization and a path attribute that points to foliodata.vdl, which by implication is found in the client_resources folder.

Create a file called foliodata.vdl in the client_resources folder, and add the following content:

<vdl version="4.1">
    <vdl-page>
        <vdl-section heading="Welcome to Portfolio Optimization">
        </vdl-section>
    </vdl-page>
</vdl>

VDL files all have a <vdl> element at their root.

<vdl-page> elements are containers for view contents, and each view must contain one such element.

<vdl-section> elements are used to organize page content. For smaller pages, you might only use one section, but for larger pages, it is a good idea to separate your page content into several sections to demarcate your app's boundaries. Here, the one <vdl-section> element used has a heading attribute Welcome to Portfolio Optimization.

Republish your app in Xpress Insight and examine its user interface. If the Entity Explorer is still in view, select Advanced > Portfolio Optimization > Portfolio from the drop-down menu available in the top-left tab of the central browser pane.

A First VDL View

The user interface now contains:

• The Portfolio Optimization view group, added to the Advanced view group, as configured in the cfile.
• The Portfolio tab, generated because it is the title of the view specified in the <vdl-view> element in the cfile.
• The Welcome to Portfolio Optimization message, configured as the heading of the single <vdl-section> element in the foliodata.vdl file.

This is a simple, initial, static view that is not yet linked to model data.

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