Using the Regular Expression Editor

Several configurable options support regular expressions. A basic editor for entering and testing regular expressions is available.

If your expression includes any of the ^, [, ., $, {, *, (, \, +, ), |, ?, <, > characters and you want them to processed as plain text, you need to "escape" the character by preceding it with a backslash. For example, if your expression was application/epub+zip this would need to be written as application/epub\+zip otherwise the + character would have a special meaning and no matches would be made. Similarly, if the expression was example.com, this should be written as example\.com, as . means "any character" which could lead to unexpected matches.

To display the regular expression editor

• Click the Edit Regular Expression button displayed next to any field supporting expressions

Using the regular expression editor

1. Enter the regular expression pattern into the Pattern field
2. Enter test data into the Input field
3. The contents of the Input field will be color coded to indicate any matches with the pattern you have specified. The Results list will also display all matches found, selecting a match will highlight the matching text in the Input field
4. The Language Elements tab displays a list of common regular expression elements and examples. Double click a language element to insert it into your expression

Updating the source expression

• Click the Insert button to update the source field with the new expression and close the editor.

Automatically importing sample URL data

• Click the Load Link Map URLs button automatically load all URLs in the current link map into the test data field