@PipelineProperty(
            description = "Limits the schemas that can be used to validate data to those with a matching system id.",
            displayPriority = 2)
    public void setSystemId(final String systemId) {
        if (systemId != null && systemId.trim().length() > 0) {
            schemaConstraint.setSystemId(systemId.trim());
        } else {
            schemaConstraint.setSystemId(null);
        }
    }
An XML filter for performing inline schema validation of XML.
stroom-pipeline/src/main/java/stroom/pipeline/filter/SchemaFilterSplit.java