normal 

Indicates the delimiter is a normal delimiter. 

repeat 

Indicates the delimiter is a delimiter that delimits repetitive fields (nodes). If a node is defined to be repetitive, then a repeat delimiter can be used to delimit the repetitive occurrences, while a normal delimiter terminates the repitition. For example, a^b^c1~c2~c3~c4~c5^ where '~' is a delimiter that delimits repetitive nodes and '^' is a normal delimiter that terminates repetitive nodes.

escape 

Indicates the delimiter is an escape delimiter. The purpose of escape delimiter is to escape special bytes , such as delimiters, using predefined escape sequences. Once the bytes of the escape delimiter are matched, no action is taken except that the search is continued at the position immediately following the delimiter bytes.  

quot-esc 

The quot-esc delimiter is used to escape special bytes using quotation style escaping, that is, whatever appears within the (double) quotes is escaped. For example, assume that ',' (comma) is a normal delimiter. To escape ',' in the data, either we can use an escape sequence such as <data>\,<data> or we can use quotation marks such as "<data>,<data>". The bytes defined in the quot-escape delimiter represent the quotation marks.