How to Create a Semantic Layer
When importing the data set into Numetric, a “Field Name” will be created in the metadata for each attribute (column) in the data set. This field name cannot be edited or changed as it is a copy of the column name from the data source.
Once the data set is in Numetric, however, you can create a semantic layer by updating or changing the name of the field. Here’s how:
- Click on to the large title and delete the existing text
- Type in your desired, more user friendly name for that attribute
*Note: You do not need to reindex to save changes to the semantic layer.
In its simplest form, a semantic layer is a set of user friendly names for a data set so end users can get at what they need using regular business terms. A quick example:
Instead of pft_mgn_dol as a column header name, a good semantic layer would have something along the lines of profit margin dollars, allowing anyone using the data to understand what that attribute represents.
Additionally, a semantic layer in numetric does not replace the original names of the data fields, but instead creates a layer of user fi
If your data set is going to be used more widely by many people in the organization, a semantic layer combined with a Data Dictionary can be very useful in reducing the number of questions that come to the IT group or data warehouse administrator.