# XUL ## Identification Mozilla's XML User Interface Language, historically used to describe application interfaces. ## Notebook evidence - [[Scanned_20260730-1946|Scanned_20260730-1946]], PDF page 19. ## Relationships and evidentiary boundary [[XHTML]] · [[XAML]] · [[Digital preservation]]. The notebook occurrence preserves a historical compatibility or software clue. It does not alone prove installation, use, ownership, provenance, or the exact identification of uncertain handwriting.