Positional Matchers

Beginning of string

BOS, BOF

Matches beginning of string

Example

Extracting the first line in the string:

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"name";"age"
Homer Simpson;40
Charles Montgomery Burns;104

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BOF LD:header EOL;

Results in the first line parsed into the header field. Parsing following lines fails, as they do not begin at the start of file marker.

Middle of string

MOS, MOF

Matches any bytes in the middle of string

Example

Extracting records after the first row in the string

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"name";"age"
Homer Simpson;40
Charles Montgomery Burns;104

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MOF LD:name ';' INT:age EOL

Results in lines 2 and 3 parsed to fields name and age. Line 1 fails to parse as it begins with the beginning of the string marker.

End of string

EOS, EOF

Matches end of string

Example

Extracting the last line of the string:

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"name";"age"
Homer Simpson;40
Charles Montgomery Burns;104
total:2 persons, average age: 72 years

The following pattern matches only when the last line is followed by the end of string marker:

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LD:footer EOS

Results in the last line being extracted to the footer field. First three lines fail to parse as they are not the last in the string.