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 language The language describes the data structures as well as the data content XML folks revel in complex data structures Hierarchical data structures GIS are usually based on relational data models FME & XML You tell FME how to interpret the XML data structures.

3. Reading XML Options for Reading XML with FME GML 3.2 & XSD Most GML can be interpreted if FME can use the XSD This will work if the OGC spec. is followed and internal feature constructs are not overly complex. Xfmap script for mapping XML structure to FME features Xquery W3C compliant Xquery Map XML tags to features or attributes using XQueryExploder & XQueryExtractor 3

4. XML Formats - Reading 4

5. Writing XML Options for Writing XML with FME GML standard formats FME supports a wide range of GML profiles (GML SF0, OS MasterMap, CityGML, etc.) GML 3.2 & XSLT Apply an XSLT (Extensible StylesheetLanguage Transformations) to the output Xquery W3C compliant Xquery Map FME features to XML templates using XMLTemplater transformer 5

6. XML Formats - Writing 6

7. Writing XML - XMLTemplater 7 <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 hierarchy Creating an electricsubstation XML: Coordinates and Attributes and contains Feeder(s) contain Attributes XML Document Substation Feeder A Feeder B

9. Example Sample XML: Source of XML templates Add Xquery: replace attribute values with Xquery statements Sample 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> 

10. XML Transformers Reading XQueryExploder Split XML documents into manageable “features” XQueryExtractor Extract attributes and other structures Writing XMLTemplator Convert FME attributes to XML Transformation XSLTProcessor 10

11. Thank You! Questions? Email: dcm@safe.com @DonAtSafe http://fmepedia.com http://www.safe.com http://blog.safe.com