6. The method of claim 5 which further comprises the steps of: invoking a spelling correction program execution in said computer processor of said system in response to the presence of said highlighted display for said misspelled text string; correcting the spelling of misspelled text string; changing in said memory of said system said linguistic flag in a text node of said misspelled text string to represent a correctly spelled text string therein; removing said highlighted emphasis from said displayed text string.
5. In a data processing system having a computer processor, a memory and text input and output means, a computer implemented method for providing linguistic functions of mixed Western and Oriental text in a structured document which presents single-byte character set (SBCS) and double-byte character set (DBCS) text in the same document, comprising the steps of: inputting in said memory of said system a first alphanumeric character; determining in said computer processor of said system whether said input character is SBCS or DBCS; determining in said memory of said system a current document position; inserting in said memory of said system the input character into a DBCS text node if the input character is determined to be DBCS; inserting in said memory of said system a character into an SBCS text node if the input character is determined to be SBCS; creating in said memory of said system an SBCS text node and inserting the character therein if the input character is determined to be an SBCS character and a document position is determined to be DBCS; setting in said memory of said system a linguistic flag to an initial value which assumes that the SBCS text string is correctly spelled; performing in said computer processor of said system a spell verification operation on said SBCS text string; changing in said memory of said system said linguistic flag to represent a misspelling of said SBCS text strings as determined by said step of performing said spell verification; displaying in said output means of said system said misspelled SBCS text string in a highlighted mode to emphasize a location of a misspelled SBCS text string; creating in said memory of said system a DBCS text node and inserting the character therein if the input character is determined to be a DBCS character and said document position is determined to be SBCS; setting in said memory of said system a linguistic flag to an initial value which assumes that the DBCS text string is correctly spelled; performing in said memory of said system a spell verification operation on said DBCS text string; changing in said memory of said system said linguistic flag to represent a misspelling of said DBCS text strings; displaying in said output means of said system said misspelled DBCS text string in a highlighted mode to emphasize the location of a misspelled DBCS text string.