We have a number of products (say,

we want to post on our website that are pretty identical but with very slight differences based on the platform they are intended to be used for. I am wondering if there are any strategies I can use to manage the content on these pages such that I can update the core content of the products and have them all update properly, and then just have to modify the slight differences for each platform. I have used Adobe Framemaker in the past and they have what is called "conditional text" where I have sections which are common to all interspersed with custom sections tied to, say, each platform.
One way I can think of for this is to use a lot of chunks but I wonder if there is a more elegant way.
Thanks