The document discusses XML and its use in FME. It provides an overview of options for reading and writing XML data with FME, including using XSD, Xfmap scripts, XQuery, and XML templates. It also provides an example of using an XML template and XQuery to write XML output that maps FME feature attributes to the template.

1. Cook’n up some XML

2. Why is XML so difficult?XML is a languageThe language describes the data structures as well as the data contentXML folks revel in complex data structuresHierarchical data structuresGIS are usually based on relational data modelsFME & XMLYou tell FME how to interpret the XML data structures.

3. Reading XMLOptions for Reading XML with FMEGML 3.2 & XSDMost GML can be interpreted if FME can use the XSDThis will work if the OGC spec. is followed and internal feature constructs are not overly complex.Xfmapscript for mapping XML structure to FME featuresXqueryW3C compliant XqueryMap XML tags to features or attributes using XQueryExploder & XQueryExtractor3

4. XML Formats - Reading4

5. Writing XMLOptions for Writing XML with FMEGML standard formatsFME supports a wide range of GML profiles (GML SF0, OS MasterMap, CityGML, etc.)GML 3.2 & XSLTApply an XSLT (Extensible StylesheetLanguage Transformations) to the outputXqueryW3C compliant XqueryMap FME features to XML templates using XMLTemplater transformer5

6. XML Formats - Writing6

7. Writing XML - XMLTemplater7<feederObjectobjectID="{fme:get-attribute("objectID")}"> <feederName>{fme:get-attribute("feederName")}</feederName> <feederNo>{fme:get-attribute("feederNo")}</feederNo> <eaLoc>{fme:get-attribute("eaLoc")}</eaLoc></feederObject>

8. Example: XML Object hierarchyCreating an electricsubstation XML:CoordinatesandAttributesand containsFeeder(s) containAttributesXML DocumentSubstationFeeder AFeeder B

9. ExampleSample XML:Source of XML templatesAdd Xquery: replace attribute values with Xquery statementsSample XML <substationobjectID="Vancouver Substation"> <mapLocation> <coord> <X>669170.169</X> <Y>1000199.534</Y> </coord> </mapLocation> <facilityID>5E67B377</facilityID> <sectionID>RPG123</sectionID> <phaseCode>ABC</phaseCode> <feederList> <feederObjectobjectID="8-64"> <feederName>10-24</feederName> <feederNo>8763</feederNo> <eaLoc>9D2D</eaLoc> </feederObject> <feederObjectobjectID="8-65"> <feederName>10-25</feederName> <feederNo>8766</feederNo> <eaLoc>9D3F</eaLoc> </feederObject> </feederList> <name>Vancouver Central</name> </substation><feederObjectobjectID="{fme:get-attribute("objectID")}"> <feederName>{fme:get-attribute("feederName")}</feederName> <feederNo>{fme:get-attribute("feederNo")}</feederNo> <eaLoc>{fme:get-attribute("eaLoc")}</eaLoc></feederObject>