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Node names, namespaces and types

Source: R/node.R
html_name.Rd

Vectorized accessors returning one value per node, with NA for missing nodes.

Usage

html_name(x)

html_namespace(x)

html_type(x)

Arguments

x

A zuhtml_document or zuhtml_nodeset.

Value

A character vector as long as x.

  • html_name(): the element name, lowercase for HTML elements and in the spec's mixed case for SVG ones such as "foreignObject"; the doctype's name for a doctype node; NA for other nodes.

  • html_namespace(): the namespace URI of an element, for example "http://www.w3.org/1999/xhtml" or "http://www.w3.org/2000/svg"; NA for other nodes.

  • html_type(): one of "document", "fragment", "doctype", "element", "text", "comment" and "processing_instruction". A <template> is an "element".

See also

Other node values: html_attr(), html_markdown(), html_serialize(), html_strings(), html_text(), html_text_clean()

Examples

doc <- html_parse("<p>Text<svg><foreignObject/></svg><!-- note -->")
nodes <- html_children(html_children(html_root(doc))[2], FALSE)
nodes <- html_children(nodes, FALSE)
html_type(nodes)
#> [1] "text"    "element" "comment"
html_name(nodes)
#> [1] NA    "svg" NA   
html_namespace(nodes)
#> [1] NA                           "http://www.w3.org/2000/svg"
#> [3] NA