trouble using FOP to process FO file generated by Xalan or Saxon

I was using xsltproc as my XSLT processor, but it ran out of
memory on a large book, so I decided to try Xalan and Saxon to convert a test
book. I set up Xalan and Saxon according to the instructions in Bob Stayton’s
book, DocBook XSL: The Definitive Guide (http://www.sagehill.net/docbookxsl/index.html).
However, when I try to use FOP 0.93 to convert either of the attached FO files,
it reports the following exception:

 

org.xml.sax.SAXParseException:
Content is not allowed in prolog.

 

I pasted full output of the exception below.

 

Has anyone else experienced this problem? Please take a look
at the attached FO files and tell me what’s wrong.

 

Regards,

Jeff Powanda

 

 

[Fatal Error] :1:1: Content is not allowed in
prolog.

Jun 9, 2007 5:21:38 PM
org.apache.fop.image.analyser.XMLReader createDocument

WARNING: Error while constructing image from XML

org.xml.sax.SAXParseException: Content is not
allowed in prolog.

      at
org.apache.xerces.parsers.DOMParser.parse(Unknown Source)

      at
org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)

      at
javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:98)

      at
org.apache.fop.image.analyser.XMLReader.createDocument(XMLReader.java:115)

      at
org.apache.fop.image.analyser.XMLReader.loadImage(XMLReader.java:95)

      at
org.apache.fop.image.analyser.XMLReader.verifySignature(XMLReader.java:65)

      at
org.apache.fop.image.analyser.ImageReaderFactory.make(ImageReaderFactory.java:85)

      at
org.apache.fop.image.ImageFactory.loadImage(ImageFactory.java:220)

      at org.apache.fop.image.ImageLoader.loadImage(ImageLoader.java:56)

      at
org.apache.fop.image.ContextImageCache.getImage(ImageFactory.java:432)

      at
org.apache.fop.image.ImageFactory.getImage(ImageFactory.java:157)

      at
org.apache.fop.fo.flow.ExternalGraphic.bind(ExternalGraphic.java:68)

      at
org.apache.fop.fo.FObj.processNode(FObj.java:118)

      at
org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:321)

      at
org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)

      at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)

      at
org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)

      at
org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown
Source)

      at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)

      at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)

      at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)

      at
org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

      at
org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

      at
org.apache.xerces.parsers.XMLParser.parse(Unknown Source)

      at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown
Source)

      at
org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)

      at
org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)

      at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)

      at
org.apache.fop.cli.Main.startFOP(Main.java:160)

      at
org.apache.fop.cli.Main.main(Main.java:191)

Jun 9, 2007 5:21:38 PM
org.apache.fop.image.ImageFactory loadImage

SEVERE: Error while recovering image information ()
: null

java.lang.NullPointerException

      at
org.apache.fop.image.analyser.XMLReader.verifySignature(XMLReader.java:66)

      at
org.apache.fop.image.analyser.ImageReaderFactory.make(ImageReaderFactory.java:85)

      at
org.apache.fop.image.ImageFactory.loadImage(ImageFactory.java:220)

      at
org.apache.fop.image.ImageLoader.loadImage(ImageLoader.java:56)

      at
org.apache.fop.image.ContextImageCache.getImage(ImageFactory.java:432)

      at
org.apache.fop.image.ImageFactory.getImage(ImageFactory.java:157)

      at org.apache.fop.fo.flow.ExternalGraphic.bind(ExternalGraphic.java:68)

      at
org.apache.fop.fo.FObj.processNode(FObj.java:118)

      at
org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:321)

      at
org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)

      at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)

      at
org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)

      at
org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)

      at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)

      at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)

      at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)

      at
org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

      at
org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

      at org.apache.xerces.parsers.XMLParser.parse(Unknown
Source)

      at
org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)

      at
org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)

      at
org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)

      at
org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)

      at
org.apache.fop.cli.Main.startFOP(Main.java:160)

      at
org.apache.fop.cli.Main.main(Main.java:191)

Jun 9, 2007 5:21:38 PM
org.apache.fop.fo.flow.ExternalGraphic bind

SEVERE: Image not available: url()

Jun 9, 2007 5:21:39 PM org.apache.fop.cli.Main
startFOP

SEVERE: Exception

javax.xml.transform.TransformerException:
org.apache.fop.fo.ValidationException:
file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234: Error(13/11234):
fo:block is not a valid child element of fo:root.

      at
org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:168)

      at
org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)

      at
org.apache.fop.cli.Main.startFOP(Main.java:160)

      at
org.apache.fop.cli.Main.main(Main.java:191)

 

---------

 

javax.xml.transform.TransformerException:
org.apache.fop.fo.ValidationException:
file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234:
Error(13/11234): fo:block is not a valid child element of fo:root.

      at
org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:501)

      at
org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)

      at
org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)

      at
org.apache.fop.cli.Main.startFOP(Main.java:160)

      at
org.apache.fop.cli.Main.main(Main.java:191)

Caused by: org.apache.fop.fo.ValidationException:
file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234:
Error(13/11234): fo:block is not a valid child element of fo:root.

      at
org.apache.fop.fo.FONode.invalidChildError(FONode.java:393)

      at org.apache.fop.fo.FONode.invalidChildError(FONode.java:378)

      at
org.apache.fop.fo.pagination.Root.validateChildNode(Root.java:127)

      at
org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:303)

      at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)

      at
org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)

      at
org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)

      at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)

      at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)

      at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)

      at org.apache.xerces.parsers.XML11Configuration.parse(Unknown
Source)

      at
org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

      at
org.apache.xerces.parsers.XMLParser.parse(Unknown Source)

      at
org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)

      at
org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)

      ... 4 more

---------

org.apache.fop.fo.ValidationException:
file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234:
Error(13/11234): fo:block is not a valid child element of fo:root.

      at
org.apache.fop.fo.FONode.invalidChildError(FONode.java:393)

      at org.apache.fop.fo.FONode.invalidChildError(FONode.java:378)

      at
org.apache.fop.fo.pagination.Root.validateChildNode(Root.java:127)

      at
org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:303)

      at
org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)

      at
org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)

      at
org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)

      at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)

      at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)

      at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)

      at
org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

      at
org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

      at
org.apache.xerces.parsers.XMLParser.parse(Unknown Source)

      at
org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)

      at
org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)

      at
org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)

      at
org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)

      at
org.apache.fop.cli.Main.startFOP(Main.java:160)

      at
org.apache.fop.cli.Main.main(Main.java:191)

 

 

Xalan_Test.fo

Saxon_Test.fo