utf8.byte-order-mark

constant

Library: UTF-8 (OMUTF8)
Import : omutf8.xmd

Returns: The UTF-8 byte-order mark.

Declaration

export constant string byte-order-mark

Purpose

Use utf8.byte-order-mark to match a UTF-8 byte-order mark sequence. Since this byte-order mark can interfere with later processing, it is sometimes better to remove it from the input. For example, since a UTF-8 byte-order mark can interfere with XML processing, it can be dropped from the input before the latter is passed to the XML parser.

Example

The following example uses utf8.byte-order-mark to remove a leading byte-order mark from the file input.xml before processing it with the XML parser:

  import "omutf8.xmd" prefixed by utf8.
  
  process
     do xml-parse scan file "input.xml" drop utf8.byte-order-mark?
        suppress
     done

Usage Note

To use utf8.byte-order-mark, you must import OMUTF8 into your program using an import declaration such as:

  import "omutf8.xmd" prefixed by utf8.

Related Topics

Other Library Functions