Fields
params- A named
list of query parameters. errors- A
eutil_error object. content- Result of an Entrez request stored as a character vector.
Methods
get_content(as = "text", ...)- Return the results of an Entrez query as text, xml, json, a textConnection,
or parsed to a list or data.frame; should not be used directly, use
content instead. get_error()- Return
eutil_errors; should not be used directly,
use getError instead. get_url()- Return the URL used for an Entrez query; should not be used directly,
use
getUrl instead. perform_query(method = "GET", ...)- Perform an Entrez query using either http GET or POST requests;
should not be used directly.
xmlAttr(xpath, name, as = "character", default = NA_character_)- Extract the value of XML attributes given a valid XPath expression
and an attribute name
xmlName(xpath, as = "character", default = NA_character_)- Extract the tag names of XML nodes given a valid XPath expression.
xmlSet(xpath, ...)- Extract a set of XML nodes given a valid XPath expression.
xmlValue(xpath, as = "character", default = NA_character_)- Extract the text value of XML leaf nodes given a valid XPath expression.
Extends
All reference classes extend and inherit methods from
"envRefClass". Furthermore, "einfo",
"esearch", "esummary", "efetch", "elink",
"epost", "egquery", "espell", and "ecitmatch"
all extend the "eutil" class.