XML : How can I use logical operations in android data binding?

In my layout file I'm trying to use the following syntax to specify the text inside TextView:

  android:text="@{user.isMe() && user.status.isEmpty() ? @string/EmptyStatusHint : user.status}"/>    

and I'm getting:

[Fatal Error] fragment_user_profile.xml:142:58: The entity name must immediately follow the '&' in the entity reference.

In Data Binding Guide there is no something special about.

So, regarding this situatuion, I have two questions:

1. How can I use my logical statement in xml for data binding?
2. What is the "entity" mentioned in the error report? I suppose I should know that ))