There is a lot to the definition of a professional. There are many questions here asking how to identify components of what is essentially a professional programmer - how do you identify or communicate expertise, specialization, high quality work, excellent skills in relation to the profession.
I am specifically looking for methods to communicate a specific component, and I quote from wikipedia:
A high standard of professional
ethics, behavior and work activities
while carrying out one's profession
(as an employee, self-employed person,
career, enterprise, business, company,
or partnership/associate/colleague,
etc.). The professional owes a higher
duty to a client, often a privilege of
confidentiality, as well as a duty not
to abandon the client just because he
or she may not be able to pay or
remunerate the professional. Often the
professional is required to put the
interest of the client ahead of his
own interests.
How can I most efficiently communicate my professionalism, in the spirit of the quote above, to current and potential clients and employers?