Enum Tag 

pub enum Tag {
    Outside,
    Begin(String),
    Inside(String),
    End(String),
    Single(String),
}

A single tagging-scheme tag.

Variants

Outside

Outside any span.

Begin(String)

Begin a span of the given type.

Inside(String)

Inside (continue) a span of the given type.

End(String)

End of a multi-token span of the given type (BIOES only).

Single(String)

Single-token span of the given type (BIOES only).

Implementations

impl Tag

pub fn parse(s: &str) -> SeqResult<Tag>

Parse a tag string such as "B-PER", "I-LOC", "S-ORG", or "O".

The case-sensitive single-letter prefix selects the variant; the remainder after the - is the entity type.

Errors

SeqError::InvalidObservation for an unrecognised prefix or a missing -type body on a non-O tag.

pub fn to_tag_string(&self) -> String

Format this tag back into its canonical string.

pub fn entity_type(&self) -> Option<&str>

The entity type (None for Tag::Outside).

Trait Implementations

impl Clone for Tag

fn clone(&self) -> Tag

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Tag

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Tag

impl PartialEq for Tag

fn eq(&self, other: &Tag) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Tag