Streaming tag scanner for the well-formed machine-generated XML
rmorie consumes (CKAN, ArcGIS, StatCan, SIU exports). Emits
start/text/end events; morie_fetch_xml builds a plain list
tree from them.
Usage
morie_xml_sax(txt, on_start = NULL, on_text = NULL, on_end = NULL)
Arguments
- txt
XML text (single string).
- on_start, on_text, on_end
Optional callbacks:
on_start(tag, attrs), on_text(text),
on_end(tag).
Value
Invisibly, the number of elements seen.
Examples
starts <- character(0)
morie_xml_sax("<a><b>hi</b></a>",
on_start = function(tag, attrs) starts <<- c(starts, tag))
starts
#> [1] "a" "b"
