a very common use case for regexes is to find matches that are preceded or followed by some context. a classical example being all lines that end with ‘a’. this requirement is usually expressed with a lookahead, where upon finding an ‘a’, you look ahead to check if it’s the end of the line. in a backtracking engine, this is very easy to implement - you just duct-tape the logic that checks the next character, but in a DFA-based engine, this is impossible because you cannot report “the match is here” if the next character is not even known yet. and by the time you know the next character, the position information is lost, so you can’t report the match retroactively (well, unless the distance is fixed of course..).
“As a lifelong Pokémon fan, it's been an incredible honor to help bring these Pokémon to life in LEGO brick form for the first time,” said Siddharth Muthyala, Design Director on LEGO Pokémon in a press release. “Pokémon has inspired generations of fans around the world, so our team approached the design of these sets with immense care and passion, ensuring every detail and pose truly celebrates what makes these characters so beloved."
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The death toll is even higher in France and Spain, where many of the seabird populations that breed in the UK spend the winter, raising fears of catastrophic seabird "wreck".
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RELAX NG grammar and also against Schematron