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Basic Patterns Elements

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*

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* — any (possibly zero-length) sequence of characters.

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How to use
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state: catchAll\n        q!: *\n        a: I don’t understand you.
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state: start\n        q!: * \n        a: Let’s get started!\n        go!: /SecondStep
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word

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word — the specified word, checked against the request character-by-character and in accordance with its position in the phrase.

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How to use
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state:\n    q!: hello\n    a: Hello! What's up?
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* stem *

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*stem* — stemma: checks if the word contains the given character sequence.

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Asterisks can be placed:

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How to use
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state:\n    q: * *info* * // will match \"info\", \"information, \"metainfo\"\n    a: More information is available at http://example.cn
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(word1|word2|or a phrase)

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(word1|word2|or a phrase) — alternatives: checks whether the request contains any of the given alternatives.

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The options are separated by either | or /. They may recursively contain any other embedded pattern elements.

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How to use
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state:\n    q: (hello | good* (morning/day/evening) | greet* )\n    a: Hiya!
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[an optional word|or another phrase]

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[an optional word|or another phrase] — options: elements within square brackets need not be present within the request.

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If they are, the weight of the pattern is increased.

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Alternatives with options are also supported.

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How to use
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state: How many players\n    q: * {(how [many|much]) (gamer*|player*|people) [can] [play]} *\n    q: * [game] for one * [or] [many] *\n    q: * {([game]|in the game) [is] [there] (multiplayer [mode]|for several player*)} *\n    a: This is a single-player adventure.
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{word1 word2 (1|2)}

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{word1 word2 (1|2)} — permutations: checks whether its elements are contained within the request in any order.

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Permutation elements are separated by spaces.

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Any element may recursively contain other pattern elements to an arbitrary level of embedding.

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You should include no more than 5-6 elements into permutations.

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How to use
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state: How much gameplay\n    q: * {(how [much|many]) gameplay} *\n    q: * {[how] (big|great) [is] [the] [game]} *\n    a: The script for this game took about 2 thousand pages!
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