Chapter 5. Extracting Metadata from the Input File

You can extract metadata from your flat data file. Right-click the first edge and select New metadata → Extract from flat file.

Figure 5.1. Extracting Metadata

The following window opens:

Figure 5.2. Introductory Window of Metadata Editor

You must find the input.dat file and click the Open button.

Figure 5.3. Selecting Data File

The Metadata Editor fills up:

Figure 5.4. Metadata Editor (Introductory Pane Filled)

Click Next. After that, you can see the following window:

Figure 5.5. Metadata Editor (Editing Pane)

As you can see, the wizard guessed that the records consisted of three fields and it also understood that the third field values were integer numbers.

If you want, you can replace the three default field names (Field1, Field2 and Field3) by others: fname, lname and salary, for example.

To do that, click the Field1 item after which it appears on a blue background.

Figure 5.6. Renaming a Field

You only need to type the desired field name (fname) and click Enter.

Figure 5.7. The Field Has Been Renamed

Do the same with the other two field names. The result will look like this:

Figure 5.8. All Fields Have Been Renamed

Now click Finish. This way you have created metadata. But they are still not assigned to the edges.