/spacy/lang/norm_exceptions.py

# These exceptions are used to add NORM values based on a token's ORTH value.
# Individual languages can also add their own exceptions and overwrite them -
# for example, British vs. American spelling in English.

# Norms are only set if no alternative is provided in the tokenizer exceptions.
# Note that this does not change any other token attributes. Its main purpose
# is to normalise the word representations so that equivalent tokens receive
# similar representations. For example: $ and € are very different, but they're
# both currency symbols. By normalising currency symbols to $, all symbols are
# seen as similar, no matter how common they are in the training data.


BASE_NORMS = {
    "'s": "'s",
    "'S": "'s",
    "’s": "'s",
    "’S": "'s",
    "’": "'",
    "‘": "'",
    "´": "'",
    "`": "'",
    "”": '"',
    "“": '"',
    "''": '"',
    "``": '"',
    "´´": '"',
    "„": '"',
    "»": '"',
    "«": '"',
    "‘‘": '"',
    "’’": '"',
    "？": "?",
    "！": "!",
    "，": ",",
    "；": ";",
    "：": ":",
    "。": ".",
    "।": ".",
    "…": "...",
    "—": "-",
    "–": "-",
    "--": "-",
    "---": "-",
    "——": "-",
    "€": "$",
    "£": "$",
    "¥": "$",
    "฿": "$",
    "US$": "$",
    "C$": "$",
    "A$": "$",
    "₺": "$",
    "₹": "$",
    "৳": "$",
    "₩": "$",
    "Mex$": "$",
    "₣": "$",
    "E£": "$",
}