We have the following variable the user can assign values to:

{username}
{password}
{email}
{firstname}
{lastname}
{subject}
{summary}
{content}
{tags}
{homepage}
{location}
{interest}
{occupation}
{facebook}
{twitter}
{skype}
{bio}
{birthyear}
{birthmonth}
{birthday}
{signature}
{userdata1}
{userdata2}
{userdata3}
{userdata4}
{userdata5}

And we have the macros which can be used as the value and will be resolved when needed:

1 {timestamp}
2 {randommonth}
3 {date}
4 {time}
5 {randomnumber[100]}
6 {randomnumber[0,100]}
7 {randomletters[16]}
8 {randompassword[16]}
9 {email}

What variable shall allow what macros?
I have for username for example 1, 5, 6, 7
Birthyear can be 6, birthmonth 2, 5 and birthday 5
What shall we allow for the other?