the attribute of property

Hi,all:

     I am a new learner of teststand, and i have some questions confused! There are two ones:

1: the property attributes

    The help file of TS tells we can creat a attribute of property,such as step or sequence; and i don't know in which condition we can use it ,

show me the examples may be better; i was confused about it for long time.

2: the attribute named "TestStand Hyperlink"

    I find one sample for TDMS, and the attribute named " TestStand Hyperlink",  and i don't know where it define?