Importing and Exporting Schema Component Models
From version 9.0, Saxon provides the ability to export or import a compiled schema. The export format is an XML
file, known as an SCM file (for schema component model). Exporting a schema in SCM format makes it quicker to reload
when the same schema is used again. It is also a format that is easier for programs to analyze, in comparison with
raw XSDL schema documents.
The simplest way to create an SCM file is from the command line, using the
command with the
-scmout option. This is described here. Alternatively,
an SCM file can be generated programmatically using the class
which is described in the JavaDoc. The serializer is unselective: it will output an SCM containing all the schema components
that have been loaded into the Configuration, other than built-in schema components.
An SCM file can be imported using the
-scmin option of the
It can also be loaded programmatically using the
SchemaModelLoader class. For example:
SchemaModelLoader loader = new SchemaModelLoader(config);
loader.load(new StreamSource(new File("input.scm")));
A schema loaded in this way is then available for all tasks performed using this Configuration, including validation
of source documents and compiling of schema-aware queries and stylesheets. In particular, it can be used when
compiled queries are run under this Configuration.
Schema Component Models can also be imported and exported using the
exportComponents() methods of the
SchemaManager in the s9api interface.