JRT's coat type

Coat type can be divided into three different categories: smooth, broken, and rough. Sometimes it can be extremely difficult to distinguish what category a terrier falls into.

Trace Hair - uncontrollable lengths of hair that does not lay close to the body.

Smooth Coat A coat that does not have trace hair on the head, face, legs or body. A smooth coat does not require any alterations to be ready for the show ring. The coat should not be sparse or soft - it should provide protection from the elements. The coat lies close to the body and is short and soft to the touch.
Broken Coat A coat the is very similar to a smooth coat but has trace hair on the head, face, legs or body. A broken coat needs minimal alterations to be ready for the show ring. They will generally only require a quick tidying up. A broken coat should not be soft - it should be harsh to provide protection from the elements. The coat is a mix of short and long hairs making some parts of the body smooth and some parts rough.
Rough Coat A coat that has excess trace hair on the head, face, legs or body. The hair is longer than on a smooth or broken coat. A rough coat requires more alterations than a broken coat to be ready for the show ring. A rough coat should not be soft or wooly - it should be harsh to provide protection from the elements. The hair should be fairly wiry, but not hard, wavy, woolly or soft. Rough coats are often mistaken as long-haired Jack Russell Terriers. Grooming Many Jack Russell Terriers do not receive correct grooming. They should be hand stripped. Start by grooming the hair upwards, against the growth pattern with a slicker-brush, this should eliminate most long hairs. Then start at the back of the neck going downwards, hand stripping with your finger and thumb. Continue doing this until the dog looks presentable, and then if there are any stragglers, go round gently with a pair of grooming scissors and trim them away.

Source:
http://www.therealjackrussell.com/advice/coat.php
http://www.dogsey.com/dog-articles.php?t=13785

PS from Amber: After viewing this infos, Jie jie(Sharon) was wondering if i am a Broken coat or smooth coat..?? people who sees me always ask jie jie why my coat/fur is longer than their JRT and commenting that i have long fur for a smoot coat... my "hair" is not lies very closely to my skin compare to other JRT... and jie jie always thought i'm a smooth coat.....



Some "close-up" picture to show my "long fur" especially on my neck area, chest area and tail. (the "hair" close to my ears are especially long but have been shaved off on my last grooming before CNY...)