How many decimal places for EURUSD?

Beginner Questions
1

Hello,

Looking at many examples on the internet for a currency.
Example: EURUSD

It says that it has a price with 4 decimal places like:
1.1893

I have downloaded market prices from my broker and here some prices show 6 decimal places like below example. It can also show 4 decimal places as seen below:
[B]01/06/2015,1328,1.188625,1.188775,1.188475,1.188775,0
01/06/2015,1329,1.188775,1.189325,1.188725,1.189175,0
01/06/2015,1330,1.189175,1.189375,1.189175,1.189325,0
01/06/2015,1331,1.189325,1.189325,1.189175,1.189325,0
01/06/2015,1332,1.1893,1.189325,1.1892,1.189275,0[/B]

I wonder why they give 6 decimal places like this example. This happens for many different pairs.
This gets me confused.

Why I ask this is because I need to be sure to know how to know what 1 PIP is for a specific currency pair.

Is it true that a specific currency pair has an international RULE to how many decimal places that currency pair has, as we will count the last decimal place difference as 1 PIP?
How will I do and think when looking at the data/price example above with 6 decimal places?

2

A pip is the 4th decimal place on most pairs except jpy

3

I see. I wonder why this broker gives as much as 6 decimal places. What is the reason for this, I would also need to understand that to put the wondering away?

[B]01/06/2015,1331,1.189325,1.189325,1.189175,1.189325,0[/B]

For the data I have, should I round up to 4 decimal places like this?:
1.189325 [B]to [/B],1.1893