The Catalog demo in Mapbuilder allows you to search a catalog, add layers onto a map and arrange the layers in the resultant Context document.

This tutorial explains how the model and widgets for the catalog demo work, and how to add a new data source to search. Eg: querying and processing a WMS GetCapabilities request.

Data Flow

1. A form is created for user to enter Catalog query information: widget/CatalogSearchForm.xsl or CatalogSearchForm.paint()
2. A user populates a form with query information.
3. The widget builds a query for the Catalog: widget/CatalogSearchForm.doSelect()
4. The Catalog is queried and XML results put into a Response model.
5. The widget converts the ResponseXML to OWS Context format as a ResponseContext: widget/CatalogSearchForm.handleResponse() calls tool/xsl/ebrim2Context.xsl
6. The user can then copy layers from the Response Context into the MainMap Context.

Files to create or update

Search widget

Create yourself a new widget, which you can base upon widget/CatalogSearchForm. Eg WmsGetCapabilities.

Stylesheet to convert to OWS Context

You need to convert the response to an OWS Context. See tool/xsl/ebrim2Context.xsl

Example files

Update the examples/catalog/ files:

1. index.html
2. config.xml

References:

• OWS Context schema and example
• More mapbuilder example docs referenced at: OWS Context and WMC examples