isSingleHit: Parse the RN from a single Substance Page

In meerapatelmd/skyscraper: Scrape Clinical Drug Data

Description

There are 2 HTML responses involved in ChemiDPlus scraping. The first HTML response is associated with the concept search while the second is for the 1 to 5 Registry Numbers and their URLs if records were found. The ChemiDPlus parsing functions delineate the response into 3 groups: searches the resulted in no records, a single record, or multiple records (currently limited to parsing a maximum of 5 records).

Usage

isSingleHit(response)

Arguments

response

"xml_document" "xml_node" class object returned by calling xml2::read_html on the rn_url

Single Hit

If a ChemiDPlus search results in a single match, the URL returned is the RN URL itself that is derived from the "h1" HTML node. For multiple matches, the "h1" HTML node returns blank.

See Also

html_nodes,html_text strsplit as_tibble,tribble extract,pivot_wider mutate str_remove

Other chemidplus parsing: is404(), isMultipleHits(), isNoRecord()

meerapatelmd/skyscraper documentation built on Dec. 27, 2020, 7:46 a.m.