mode NONE example
@@ -123,6 +123,51 @@ The result will be the following table in KGTK format:
| h13 | linda_hamilton | label | Linda Hamilton | | en |
| h15 | linda_hamilton | birth_date | ^1956-09-26T00:00:00Z/11 | | |
+Suppose that `file3.tsv` contains the following **not** in KGTK format,
+
+| a | b | c | d |
+|-----|----------------|-------------|---------------------------|
+| h21 | robert_patrick | label | Robert Patrick |
+| h22 | robert_patrick | instance_of | human |
+| h23 | robert_patrick | birth_date | ^1958-11-05T00:00:00Z/11 |
+| h24 | robert_patrick | country | United States of America |
+
+trying to run the command ,
+
+```
+kgtk cat -i file1.tsv.gz file3.tsv
+```
+
+will result in an error message ,
+
+```
+In input 2 header 'a b c d': Missing required column: id | ID
+Exit requested
+```
+
+We can force `kgtk cat` command to concatenate anyway using the `--mode NONE` option,
+
+```
+kgtk cat -i file1.tsv.gz file3.tsv --mode NONE
+```
+
+| id | node1 | label | node2 | rank | a | b | c | d |
+|-----|------------|-------------|-----------------------|------|-----|----------------|-------------|--------------------------|
+| t1 | terminator | label | The Terminator@en | 4 | | | | |
+| t2 | terminator | instance_of | film | 3 | | | | |
+| t3 | terminator | genre | action | 1 | | | | |
+| t9 | terminator | director | james_cameron | 8 | | | | |
+| t10 | terminator | cast | arnold_schwarzenegger | 2 | | | | |
+| t11 | t10 | role | terminator | 7 | | | | |
+| t12 | terminator | cast | michael_biehn | 2 | | | | |
+| t13 | t12 | role | kyle_reese | 1 | | | | |
+| t14 | terminator | cast | linda_hamilton | 2 | | | | |
+| t15 | t14 | role | sarah_connor | 9 | | | | |
+| | | | | | h21 | robert_patrick | label | Robert Patrick |
+| | | | | | h22 | robert_patrick | instance_of | human |
+| | | | | | h23 | robert_patrick | birth_date | ^1958-11-05T00:00:00Z/11 |
+| | | | | | h24 | robert_patrick | country | United States of America |
+
# Expert Topic: Adding Column Names
Suppose that you have a TSV (tab-separated values) data file
