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- GML Examples
- ================
- This directory contains sql scripts which show, by example, how to use
- the GML features of Spatial DataBlade. You can run any of these
- scripts using a SQL editor such as DB-Access, or SQLEditor on NT clients.
- Note: DB-Access ignores formatting characters inserted in the result,
- instead it inserts a newline after each 65 output characters. This
- algorithm clashes with the way SE_AsGML() outputs text, and the results
- may look garbled.
- XML Validation
- ----------------
- Without proper headers/trailing tags, the SE_AsGML() UDR does not produce
- an XML document, but just a fragment. An element in a well-formed XML
- document that contains SE_AsGML() output should have attributes that
- relate to the GML schema and other extension schema documents if
- applicable. You may validate the document using a schema-aware parser.
-
- The file se_asgml.xml contains GML fragments embedded in a <document>
- element. Here is how to use Apache Xerces-J.1.4.1 to validate this
- se_asgml.xml (make sure the files xerces.jar and xercesSamples.jar are in
- your CLASSPATH):
- java dom.DOMCount -v se_asgml.xml
- Note: the validation will generate the following error message:
- 'The error 'Element type "document" must be declared.'
- This happens because a "document" element that is not defined elsewhere
- is used to enclose all the GML fragments. In a real application, it will
- be replaced by an application-defined element.
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