Module xml_utils 

XML building primitives: tag, escape_xml, and extract_xml_tag_value. Low-level XML building primitives used throughout the crate.

These utilities are deliberately simple and allocation-efficient: they work on &str slices and return owned Strings, with no external XML library dependency.

Enums

TagContent

Content variants for the tag builder function.

Functions

clear_xml_string

Clean an XML string by removing namespace artifacts, collapsing inter-tag whitespace, and optionally stripping the <?xml … ?> declaration.

escape_xml

Escape special XML characters in text content and attribute values, replacing &, <, >, ", and ' with their XML entity equivalents.

extract_xml_tag_value

Extract the text content of the first occurrence of a simple XML tag in a raw XML string.

pretty_print_xml

Pretty-print an XML string by adding indentation.

remove_invalid_xml_chars

Remove characters that are invalid in XML 1.0 documents.

replace_unacceptable_characters

Replace characters that are valid in XML but rejected by SEFAZ.

tag

Build an XML tag with optional attributes and children.

validate_xml

Validate an NF-e XML string by checking for the presence of required tags.