Drupal 6 status

A new major version of Drupal is about to be released so at some point we should upgrade to it. Our Drupal site (along with most others) rely on addition modelules. Releases of Drupal are a bit messy because of the high degree of dissagregation of the development. The core is publicly released before most modules to give a stable platform for module writers. Core 6 is now released (and patched) but modules vital for most sites, such as views and CCK (see below), are still being worked on.

This model addresses the following problem:

You have a physical container with two substances, say water and salt.   You know the expression which governs the flow of water out of the container, and need to work out the rate at which salt flows out.  

Assuming that the salt in the outflow is at the same concentration as the salt in the container, the answer is to work out the salt concentration in the container, then use this, along with the water outflow, to calculate the rate of salt outflow.

These are Robert's templates.

My approach is based on instantiating only those parts of the template which are critical to its functioning.   All other bits are left red.  This is a signal to the user, so they can see which bits they ned to tie in to their own model.

I think there is a separate issue about having a working example for each template, but I think that the template itself should oblige the user to instantiate non-template parts.

This very simple template of just 5 elements (2 input parameters and 3 variables) is a scheme for roughly estimating the average temperature during the day and during the night.

Model diagram

Equation listing

Excerpt from PnET