Grammalecte  Check-in [ea6194b8b7]

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Comment:[doc] small documentation update
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SHA3-256:ea6194b8b7dd164f2d7cdd707098f8a07301ad2c019477e09d98f21245890349
User & Date: olr 2019-02-27 14:48:04
Context
2019-03-01
10:33
[fr] faux positifs check-in: bd904b6202 user: olr tags: fr, trunk
2019-02-27
14:48
[doc] small documentation update check-in: ea6194b8b7 user: olr tags: doc, trunk
13:59
[doc] small documentation update check-in: 6fb05b3dd9 user: olr tags: doc, trunk
Changes

Changes to doc/syntax.txt.

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Token rules must be defined within a graph.

## Tokens

Tokens can be defined in several ways:

* Value (meaning the text of the token). Examples: `word`, `<start>`, `<end>`, `,`.
* Lemma: `>lemma`
* Rege: `~pattern`
* Regex on morphologies: `@pattern`, `@pattern¬antipattern`.

* Metatags: *NAME. Examples: `*WORD`, `*SIGN`, etc.





































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Token rules must be defined within a graph.

## Tokens

Tokens can be defined in several ways:

* Value (meaning the text of the token). Examples: `word`, `<start>`, `<end>`, `,`.
* Lemma: `>lemma`.
* Regex: `~pattern`, `~pattern¬antipattern`.
* Regex on morphologies: `@pattern`, `@pattern¬antipattern`.
* Tags: `/tag`.
* Metatags: *NAME. Examples: `*WORD`, `*NUM`, `*SIGN`, etc.

Selection of tokens: `[token1|token2|>lemma1|>lemma2|~pattern1|@pattern1|…]`

Conditional token: `?token¿`

Conditional selection of token: `?[token1|token2|…]¿`

## Token references

Positive references are defined by a positive integer `>= 1`. Examples: \1, \2, \3, etc.
If there is at least one token set between parenthesis, these numbers refer to tokens between parenthesis, ignoring all others.
If there is no token between parenthesis, these numbers refer to tokens found in order defined by the rule triggered.

Negative references are defined by a negative integer `<= -1`. Examples: \-1, \-2, \-3, etc.
These numbers refer to the tokens beginning by the last one found by the rule triggered.

Examples:

        tokens:             alpha       beta        gamma       delta       epsilon
        positive refs:      1           2           3           4           5
        negative refs:      -5          -4          -3          -2          -1

        tokens:             alpha       (beta)      gamma       (delta)     epsilon
        positive refs:                  1                       2
        negative refs:      -5          -4          -3          -2          -1

        tokens:             alpha       (beta)      ?gamma¿     (delta)     epsilon
        positive refs:                  1                       2
        negative refs:      (-4/-5)     (-3/-4)     (-3/none)   -2          -1