Module lower 

XSD AST → IR lowering pass.

The single public entry point is lower, which converts a parsed xsd::Schema into a TypeGraph.

Name-conversion rules

Source	Rule	Example
XSD type name	kept verbatim (already PascalCase)	BusinessApplicationHeaderV04
Sequence element name → struct field	xml_to_snake_case	BizMsgIdr → biz_msg_idr
Choice element name → variant name	kept verbatim	OrgId → OrgId
Enumeration value → code variant	code_to_pascal_case	"ADDR" → Addr
Attribute name → field name	xml_to_snake_case	Ccy → ccy

Enums

LowerError

Errors that can occur during the lowering pass.

Functions

code_to_pascal_case

Convert an XSD enumeration value (typically all-caps) to a PascalCase Rust variant name.

lower

Lower an XSD Schema into a TypeGraph.

xml_to_snake_case

Convert an ISO 20022 XML element name (PascalCase / mixed-case / all-caps) to a snake_case Rust identifier.