Function Reference

This section provides detailed documentation for all functions in the webbed extension.

Function Categories

Category	Description
File Reading & String Parsing Functions	Read XML/HTML files or parse strings into tables (`read_xml`, `parse_xml`, etc.)
XML Extraction Functions	Extract data from XML using XPath (`xml_extract_text`, `xml_extract_attributes`, etc.)
HTML Extraction Functions	Extract data from HTML (`html_extract_text`, `html_extract_links`, etc.)
Conversion Functions	Convert between formats (`xml_to_json`, `json_to_xml`, etc.)
Utility Functions	Utility functions (`xml_valid`, `xml_stats`, `xml_pretty_print`, etc.)

Function	Description
`read_xml(pattern)`	Read XML files into table with schema inference
`read_xml_objects(pattern)`	Read XML files as document objects
`read_html(pattern)`	Read HTML files into table with schema inference
`read_html_objects(pattern)`	Read HTML files as document objects
`parse_xml(content)`	Parse XML string with schema inference
`parse_xml_objects(content)`	Parse XML string as document object
`parse_html(content)`	Parse HTML string with schema inference
`parse_html_objects(content)`	Parse HTML string as document object

Function	Description
`xml_extract_text(xml, xpath)`	Extract all text matches using XPath → VARCHAR[]
`xml_extract_all_text(xml)`	Extract all text content from document
`xml_extract_elements(xml, xpath)`	Extract all matching elements → xmlfragment[]
`xml_extract_elements_string(xml, xpath)`	Extract all matching elements as newline-separated text
`xml_extract_attributes(xml, xpath)`	Extract attributes from matching elements
`xml_extract_comments(xml)`	Extract XML comments with line numbers
`xml_extract_cdata(xml)`	Extract CDATA sections with line numbers

Function	Description
`html_extract_text(html)`	Extract all text from HTML document
`html_extract_text(html, xpath)`	Extract text using XPath expression
`html_extract_links(html)`	Extract all links with metadata
`html_extract_images(html)`	Extract all images with metadata
`html_extract_tables(html)`	Extract tables as rows (table function)
`html_extract_table_rows(html)`	Extract table data as structured rows
`html_extract_tables_json(html)`	Extract tables with rich JSON structure
`html_escape(text)`	Escape HTML special characters
`html_unescape(text)`	Decode HTML entities to text

Function	Description
`xml_to_json(xml, ...)`	Convert XML to JSON with options
`json_to_xml(json)`	Convert JSON to XML
`to_xml(value)`	Convert any value to XML
`to_xml(value, node_name)`	Convert value to XML with custom node name
`html_to_duck_blocks(html)`	Convert HTML to list of document blocks
`duck_blocks_to_html(blocks)`	Convert document blocks back to HTML

Function	Description
`xml_valid(xml)`	Check if XML is well-formed
`xml_well_formed(xml)`	Alias for xml_valid
`xml_stats(xml)`	Get document statistics
`xml_namespaces(xml)`	List XML namespaces
`xml_common_namespaces()`	Get map of well-known namespace prefixes
`xml_lookup_namespace(prefix)`	Look up URI for common namespace prefix
`xml_detect_prefixes(xpath)`	Detect namespace prefixes in XPath
`xml_find_undefined_prefixes(xml, xpath)`	Find prefixes not declared in XML
`xml_mock_namespaces(prefixes)`	Create mock URIs for prefixes
`xml_add_namespace_declarations(xml, map)`	Add namespace declarations to XML
`xml_pretty_print(xml)`	Format XML with indentation
`xml_minify(xml)`	Remove whitespace from XML
`xml_wrap_fragment(fragment, wrapper)`	Wrap XML fragment with element
`xml_validate_schema(xml, xsd)`	Validate against XSD schema
`xml_libxml2_version(name)`	Get libxml2 version info