Toggle between the 'Regex' and 'XPath' modes by pressing the selector toolbar button above the expression editing pane. The immediately previous results are cached when switching modes.
When the 'Regex' mode is selected, expressions are interpreted using the .NET Regex engine.
Auto or Pause Mode
The default mode for evaluating expressions is 'Auto', where the expression is evaluated as it is edited. For extremely long files however, a 'Pause' mode is available, where the expression is only evaluated when you type <enter> or press 'Run Regex' from the toolbar.
Case Sensitivity
By default, no case sensitivity is used to evaluated a regular expressions, if case sensitivity is required, click the 'case sensistive' button on the expression toolbar.
Regex Results
Results are listed in the Results Pane and can be stepped through in the same way as XPath expression results.
When each result is selected, its position in the tree-view and raw-xml view are highlighted and the full XPath location of the result is shown (see illustration to right).
The Regex Results Pane shows the ordinal position, value, start position (in the text) and length of each match.
Sorting Results
The results of a regular expression may be sorted by clicking on the required column header of the results table.