Hey all!

I am currently working on trying to cache weather data received from an API call (the format is in xml, hence xslt). I have found plenty of examples of passing arguments [i]into[/i] xslt, but none involving setting parameters or caching the results to be used later.

What I want is to receive the API call approximately every 15 minutes. From there it is received by my xslt macro, which caches the results. My current objective is to cache these into a document's parameters which would then be called to display it on the header of every page in the website. If there are any other, more efficient, options then please let me know.

While I understand that Umbraco can cache results, judging from this link: http://our.umbraco.org/forum/developers/extending-umbraco/9745-How-does-macro-caching-work

....There is no fallback (if it fails, then it fails and I would assume the page would look hideous, if not fail loading).

Short version:

1.) Is there anyway to edit a document's parameters using an XSLT macro? (If so, how to?)

2.) Are there any other, more efficient, ways of caching data using XSLT  to be used later?