IDML Filter: yield font mapping capabilities

The font mapping can be considered as a filter ability to automatically substitute font information in the target file on the fly, according to a provided configuration.

The following font mapping configuration options have to be present:

• The target language: en, en-UK, etc. It can be left empty to apply the mapping to any target language.
• The source font name regular expression pattern: Arial.*, Times New Roman, etc. It can be left empty to apply the mapping to any source font name found.
• The target font name: Arial, Times New Roman, etc. It should not be empty. And if it is made so, the mapping configuration can be ignored.

The attached IDML file can be used for initial experiments.