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Oxygen XML Editor helps you edit a Schematron schema through the Content Completion Assistant, offering proposals that are valid at the cursor position. It can be manually activated with the Ctrl + Space (Command + Space on OS X) shortcut.

When you edit the value of an attribute that refers a component, the proposed components are collected from the entire schema hierarchy. For example, if the editing context is phase/active/@pattern, the Content Completion Assistant proposes all the defined patterns.

Note: For Schematron resources, the Content Completion Assistant collects its components starting from the master files. The master files can be defined in the project or in the associated validation scenario. For further details about the Master Files support go to Defining Master Files at Project Level.

If the editing context is an attribute value that is an XPath expression (such as assert/@test or report/@test), the Content Completion Assistant offers the names of XPath functions, the XPath axes, and user-defined variables.

The Content Completion Assistant displays XSLT 1.0 functions and optionally XSLT 2.0 / 3.0 functions in the attributes path, select, context, subject, test depending on the Schematron options that are set in Preferences pages. If the Saxon 6.5.5 namespace (xmlns:saxon="http://icl.com/saxon") or the Saxon 9.7.0.15 namespace is declared in the Schematron schema (xmlns:saxon="http://saxon.sf.net/") the content completion also displays the XSLT Saxon extension functions as in the following figure:

Figure: XSLT Extension Functions in Schematron Schema Content Completion

The Content Completion Assistant also includes code templates that can be used to quickly insert code fragments into Schematron documents.