There is no completely standardized way to do this; the most portable solution is to open a temporary file, write data to it, and hand it to the lexer. Here's a sample bit of code to do this.

And Amplifeeder can also generate a nice, data-portable XML file for users to backup all their social stream's data; XML files can also be used to restore data.

Usually, we save data in databases. However, if we want to make the data more portable, we can store the data in an XML file.