to read the data given in inbound lagacy input file

Hi Experts,

My requirement is that i have got a input inbound lagacy file that has around 31 fields that are separted by space now i have to read those values using open data set and read data set in a internal table.

each field in legacy input file is being mapped with sap technical field and the internal table has to be populated by taking the data given in the input file.

Please provide with sample code or useful link to get the internal table populated using dataset method.

satisfactory answers would be rewarded.

thanks,

Naveen