Constant xmlErrorLevel_XML_ERR_ERROR 

pub const xmlErrorLevel_XML_ERR_ERROR: xmlErrorLevel = 2;

An error

When parsing XML, this is used for recoverable errors like

• namespace errors
• validity errors when validating
• certain undeclared entities
• ID uniqueness and xml:id errors

Note that some recoverable errors in the sense of the XML spec are reported as warnings.

In other contexts, this may be used for unrecoverable errors.