Pig Load data from HDFS in Big Data Hadoop

Structured:

student = LOAD 'hdfs://localhost:9000/pig_data/student.txt'USING PigStorage(',')as ( id:int, firstname:chararray, lastname:chararray,phone:chararray,city:chararray );

           OR

student = LOAD 'hdfs://pig_data/student.txt'USING PigStorage(',')as ( id:int, firstname:chararray, lastname:chararray,phone:chararray,city:chararray );

SemiStructured:

emp = LOAD 'hdfs://localhost:9000/test/sample.xml' USING org.apache.pig.piggybank.storage.XMLLoader('employee') as (x:chararray);