1.standardController:标准的controller 是同页面的standard Object的界面button的功能和逻辑是一样的
<apex:page standardController="MyCustomObject__c">
</apex:page>
2.数据关系:
{!contact.Account.Owner.FirstName}: (a three-level child-to-parent relationship)
{!account.Contacts}:parent-to-child