Xerox 6180N Using LCDS Print Description Language - Page 35

PDL principles and procedures Table 1-2. Types of string constants Constant Definition Example Hexadecimal Normally used as string constants, but they may also be used as value constants. Each pair of hexadecimal characters results in one byte. A hexadecimal constant must immediately be preceded by the characters X apostrophe (X'), then followed by another apostrophe, to indicate to the PDL compiler that the expression that follows is in hexadecimal. IDEN PREFIX=X'C1C2C3C4'; ASCII Used as string constants. Each character results in one byte. The constants must be preceded by the characters A apostrophe (A') and followed by an apostrophe character. IDEN PREFIX=A'ABC!44EF' is equivalent to IDEN PREFIX=X'414243444546' The ASCII string type allows hexadecimal representation of characters to be embedded in a string. This is done by preceding the hexadecimal representation of the character with an ! character. The three character sequence required for the hexadecimal representation of a character results in one byte. Two successive ! characters (!!) are necessary to represent one actual ! character when printing. The two character sequence (!!) results in one byte. Using LCDS Print Description Language 1-9