Validating a datafile with the datatypes

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http://www.unix.com – I have two input files 1)datafile 2)metadata file. I have a metadata file like: field1datatypeformat1number2string3dateyy-mm-dd I have a data file like: 1234abc12-8-16 xyz234512-9-163456acd14-08-12 In the first row there is no correction as everything is inline with the metadata. In the second row,the first field is string instead of number.So I shoud get error for the corresponding row in field 1. In the third row,the date format should be yy-mm-dd ,but here it is 14-08-12 .the year cannot be 14.It shuold throw error for the corresponding field. I need a unix shell script (HowTos)