User`s guide

212 VEE User’s Guide

5 Storing and Retrieving Test Results Chapter

I/O Transaction Format

An I/O transaction to write data is usually in the following

format:

Table 18 describes the most common actions: READ, WRITE,

EXECUTE, and WAIT.

Encodings and formats refer to the way data is packaged and

sent. For instance, a TEXT encoding sends data as ASCII

characters. The TEXT encoding could be formatted in a number

of ways. For example, to send a string of letters and numbers to

a file, a WRITE TEXT STRING transaction would send the entire

string represented by ASCII characters. A WRITE TEXT REAL

transaction would only extract the Real numbers from the same

string and send them using ASCII characters for the individual

digits. Table 19 provides brief explanations of encodings.

Table 1 8 Types of I/O Transactions

Action Description

READ Reads data from the specified source using the specified

encoding and format.

WRITE Writes data to the specified target using the specified

encoding format.

EXECUTE Executes a specific command. For example, EXECUTE

REWIND repositions a file read or write pointer to the

beginning of the file without erasing the contents. EXECUTE

CLOSE closes an open file.

WAIT Waits the specified number of seconds before the next

transaction.

NOTE

There are also a number of actions for I/O ⇒ Advanced I/O Operations

that you can examine by exploring the objects in the menu.