请教在一篇关于musical artist和producer签订的合约中
里面有写关于contract material一些规范
例如说像是:
Contract material is subject to the following:
1. The producer agrees to pay the artist 100$ per song.
This will be payable within 15 days of the completed "contract material".
"Contract material" will be considered complete after all revisions
have been completed.
请教在文章中的contract material
大概是怎么样的概念?
感谢