Content Objects Schema| 文件相关对象结构

From Salesforce SOAP API Developer Guide

Remark

1. File Data saved in ContentVersion
2. When Create Content, you can just create ContentVersion
3. When insert with Base64/Blob data, VersionData, 'PathOnClient(file name) are required
4. When insert with url link, ContentUrl is required
5. ContentDocument will be created automatically