Change conceptual names (Entity and Entry)

[userlocalhost]

Background

Now, this application uses following conceptual names

1. Entity: consists of structural attribute(s) that represents what type of data it will have.
2. Entry: consists of data attribute(s) that represents what data it actually has based on its type.

Problem

It may be hard to understand these concept from each names (Entity and Entry), because the meaning of their name and description are quite different.

Proposal

I think, we should change those names as below

1. Entity → Model (consists of structural attribute(s) that represents what type of data it will have)
2. Entry → Item (consists of data attribute(s) that represents what data it actually has based on its type)

Along with this, we also have to change following model names

4. EntityAttr → ModelAttr

But both names ("entity" and "entry") in the parameters of APIv1 should be remained because of backward compatibility.

[userlocalhost]

It's not simple issue.
I tackled with this just about an hour. I'm so frustrated because it's hard to keep backward compatibility, we have to sort changing name and remaining name carefully in each files that is related with APIv1.