Update aggregations.md

Author: mbaudis

docs/aggregations.md

@@ -30,13 +30,11 @@ parameters for which the aggregation is provided
     - a distribution of all distinct values/combinations with the count of their occurrence
 * an optional `scope` parameter to indicate the entity the results refer to (usually the current entry type but might be variable for collection and overview aggregations)
 
-### Examples
-
 The following examples display different aggregation objects (which would be items in the `responseAggregation` array). Note that **id values are for demonstration only** and do not have a normative function.
 
 **Aggregations and Queries:** For most of the example cases one can envision both a use in "data overview context" (e.g. to profile the content of a resource or collection) and in "query context" (e.g. to profile the response for a specific query).
 
-#### Minimal Representation of Distinct Values Count `distinctValuesCount`
+### Example: Minimal Representation of Distinct Values Count `distinctValuesCount`
 
 How many different diseases are represented in the data?
 
@@ -49,7 +47,7 @@ How many different diseases are represented in the data?
 }
 ```
 
-#### Informative Values `anyValueCount`
+### Example: Informative Values `anyValueCount`
 
 How many individuals in the data have a follow-up time?
 
@@ -63,7 +61,7 @@ How many individuals in the data have a follow-up time?
 }
 ```
 
-#### Value Distribution `distribution`, Single Concept
+### Example: Value Distribution `distribution`, Single Concept
 
 What is the distribution of diseases in the samples?
 
@@ -100,10 +98,11 @@ What is the distribution of diseases in the samples?
 }
 ```
 
-#### Value Distribution `distribution`, Intersecting Concepts
+### Example: Value Distribution `distribution`, Intersecting Concepts
 
 What is the distribution of diseases in the samples, separately by sex?
 Please note:
+
 * there are now 2 concepts in the `concepts` list and the `conceptValues` in the distribution are observed combinations of values for both concepts, in the same order
 * the `count` indicates the number of times this combination was observed (e.g. 426 cases of "male" & "Prostate Adenocarcinoma" but 0 cases for "female" & "Prostate Adenocarcinoma")