annotate_tqueries: Annotate a tokenlist based on rsyntax queries

In rsyntax: Extract Semantic Relations from Text by Querying and Reshaping Syntax

Annotate a tokenlist based on rsyntax queries

Description

Apply queries to extract syntax patterns, and add the results as three columns to a tokenlist. The first column contains the ids for each hit. The second column contains the annotation label. The third column contains the fill level (which you probably won't use, but is important for some functionalities). Only nodes that are given a name in the tquery (using the 'label' parameter) will be added as annotation.

Note that while queries only find 1 node for each labeld component of a pattern (e.g., quote queries have 1 node for "source" and 1 node for "quote"), all children of these nodes can be annotated by settting fill to TRUE. If a child has multiple ancestors, only the most direct ancestors are used (see documentation for the fill argument).

Usage

annotate_tqueries(
  tokens,
  column,
  ...,
  block = NULL,
  fill = TRUE,
  overwrite = NA,
  block_fill = FALSE,
  copy = TRUE,
  verbose = FALSE
)

Arguments

tokens	A tokenIndex data.table, or any data.frame coercible with as_tokenindex.
column	The name of the column in which the annotations are added. The unique ids are added as column_id
...	One or multiple tqueries, or a list of queries, as created with tquery. Queries can be given a named by using a named argument, which will be used in the annotation_id to keep track of which query was used.
block	Optionally, specify ids (doc_id - sentence - token_id triples) that are blocked from querying and filling (ignoring the id and recursive searches through the id).
fill	Logical. If TRUE (default) also assign the fill nodes (as specified in the tquery). Otherwise these are ignored
overwrite	Applies if column already exists. If TRUE, existing column will be overwritten. If FALSE, the existing annotations in the column will be blocked, and new annotations will be added. This is identical to using multiple queries.
block_fill	If TRUE (and overwrite is FALSE), the existing fill nodes will also be blocked. In other words, the new annotations will only be added if the
copy	If TRUE (default), the data.table is copied. Otherwise, it is changed by reference. Changing by reference is faster and more memory efficient, but is not predictable R style, so is optional.
verbose	If TRUE, report progress (only usefull if multiple queries are given)

Value

The tokenIndex data.table with the annotation columns added

Examples

## spacy tokens for: Mary loves John, and Mary was loved by John
tokens = tokens_spacy[tokens_spacy$doc_id == 'text3',]

## two simple example tqueries
passive = tquery(pos = "VERB*", label = "predicate",
                 children(relation = c("agent"), label = "subject"))
active =  tquery(pos = "VERB*", label = "predicate",
                 children(relation = c("nsubj", "nsubjpass"), label = "subject"))

tokens = annotate_tqueries(tokens, "clause", pas=passive, act=active)
tokens
 
if (interactive()) plot_tree(tokens, annotation='clause')

rsyntax documentation built on June 7, 2022, 9:07 a.m.