This is part of archived UD v1 documentation. See http://universaldependencies.org/ for the current version.
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SYM: symbol

Definition

A symbol is a word-like entity that differs from ordinary words by form, function, or both. What makes them different from punctuation is that they can be substituted by normal words. This involves all currency symbols, e.g. ¥100 is identical to hundres yen. These words are tagged with symbol / 記号 or supplementary_symbol / 補助記号 in UniDic.

Puntuations are classified into PUNCT, while they also have supplementary_symbol / 補助記号 tag, they are distinguished by the subcategories of UniDic POS, e.g. supplementary_symbol (period) / 補助記号-句点.

Mathematical operators form another group of symbols.

Another group of symbols is emoticon and emoji including ascii art symbols tagged with supplementary_symbol(ascii_art.emoticon) / 補助記号-AA-顔文字 in UniDic.

Examples


Treebank Statistics (UD_Japanese-KTC)

There are 1 SYM lemmas (0%), 1 SYM types (6%) and 1138 SYM tokens (0%). Out of 16 observed tags, the rank of SYM is: 16 in number of lemmas, 15 in number of types and 13 in number of tokens.

The 10 most frequent SYM lemmas: _

The 10 most frequent SYM types: _

The 10 most frequent ambiguous lemmas: _ (NOUN 73916, ADP 56601, PUNCT 29066, AUX 10360, SCONJ 9060, NUM 8667, VERB 8579, ADJ 3304, PART 2730, CONJ 2110, PROPN 1795, ADV 1655, SYM 1138, PRON 138, DET 95, INTJ 15)

The 10 most frequent ambiguous types: _ (NOUN 83879, ADP 56602, AUX 29224, PUNCT 29066, VERB 24527, NUM 10685, SCONJ 9342, PROPN 7729, ADJ 4996, PART 2783, CONJ 2763, ADV 2738, SYM 1138, DET 1067, PRON 1065, INTJ 27)

Morphology

The form / lemma ratio of SYM is 1.000000 (the average of all parts of speech is 0.002927).

The 1st highest number of forms (1) was observed with the lemma “_”: _.

SYM does not occur with any features.

Relations

SYM nodes are attached to their parents using 1 different relations: ja-dep/punct (1138; 100% instances)

Parents of SYM nodes belong to 9 different parts of speech: NOUN (651; 57% instances), PROPN (340; 30% instances), NUM (68; 6% instances), SYM (41; 4% instances), VERB (31; 3% instances), ADJ (4; 0% instances), ADV (1; 0% instances), INTJ (1; 0% instances), PRON (1; 0% instances)

1097 (96%) SYM nodes are leaves.

41 (4%) SYM nodes have one child.

The highest child degree of a SYM node is 1.

Children of SYM nodes are attached using 1 different relations: ja-dep/punct (41; 100% instances)

Children of SYM nodes belong to 1 different parts of speech: SYM (41; 100% instances)


SYM in other languages: [bg] [cs] [de] [el] [en] [es] [eu] [fa] [fi] [fr] [ga] [he] [hu] [it] [ja] [ko] [sv] [u]