SWI-Prolog -- xml_quote

Documentation
- Reference manual
- Packages
  - SWI-Prolog SGML/XML parser
    - Writing markup
      - XML Quote primitives
        
        xml_quote_attribute/3
        
        xml_quote_attribute/2
        
        xml_quote_cdata/3
        
        xml_quote_cdata/2
        
        xml_name/2
        
        xml_name/1

Availability::- use_module(library(sgml)).(can be autoloaded)

xml_quote_attribute(+In, -Quoted, +Encoding)

Map the characters that may not appear in XML attributes to entities. Currently these are <>&".^{4Older
versions also mapped ’ to '.} Characters that cannot represented in Encoding are mapped to XML character entities.