The escape-character stands for `, @, |, or ?. If omitted, it stands for `\'.
The commands need the packages ProTex.sty and AlProTex.sty.
This structure provides names to code fragments (the fragments should not be too large in size).
This command acts as a place holder for the code segment associated to the title (` stands for the escape character).
This command creates a file for the code whose root node is specified.