You can do a few things -- one is the use of <readmore></readmore> tags, which will result in the details not being shown unless someone elects to specifically to view your node.

You can also post a reply to your question, with additional details, but even then it's still best to use <readmore> tags if it's excessive in length.

Linking to another site is not recommended, as someone may have something similar to your question in the future, and it's more likely to still have its full context if everything is posted on PerlMonks. (and some people don't like following random links.)