The content of the degree-value type is a number indicating the degree of the chord (1 for the root, 3 for third, etc). The text attribute specifies how the value of the degree should be displayed. The symbol attribute indicates that a symbol should be used in specifying the degree. If the symbol attribute is present, the value of the text attribute follows the symbol.
The
<degree-value>element.The content of the degree-value type is a number indicating the degree of the chord (1 for the root, 3 for third, etc). The text attribute specifies how the value of the degree should be displayed. The symbol attribute indicates that a symbol should be used in specifying the degree. If the symbol attribute is present, the value of the text attribute follows the symbol.
See
https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/degree-value/