Session IDs
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As explained in the Software Introduction
pages, you can currently access large parts of the Nematrian website free of
charge, including many of its analytical tools. However, access to some parts
or tools, particularly ones accessed through spreadsheets, may require you to
obtain a temporary session-specific Session Id (which you can currently do
by pressing a button at the top of the page used to access spreadsheets in
the Nematrian spreadsheet library), or to log in and/or to enter into a
subscription agreement. Session IDs allow the Nematrian website to keep
track of your utilisation of its facilities.
Accessing the website via a
browser
If you are only going to access the web-site directly via a
browser then in practice you currently typically do not need to worry much
about Session IDs. This is because the website currently typically automatically
creates one for you in the background and then ‘remembers’ your Session ID
as you navigate around its pages (if your browser has cookies enabled).
Accessing the website via its
associated web services
Session IDs become more important if you are planning to
make use of the website’s web services. This is
typically how you access the Nematrian function library if you are doing so
through a spreadsheet or a more complicated programming environment. Each time
you programatically call one of the Nematrian web services you need to provide
a current Session ID as well as the parameter values that the web
service will use in its computations. If you are logged in to the site or you
have obtained a temporary Session ID then your current Session ID will
be shown in a box towards the top of the page referred to above, along with the
number of CPU computation units still remaining for it and the number of
minutes remaining before it will time out.
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