Added clause 7.4.2.5 Temporal pagination

first page when going backward, and the last page, when going forward, may have

less than the maximum number of Entities.

#### 7.4.2.5 Temporal pagination

Temporal representation of resources adds an additional dimension to the pagination.

Depending on the requested time range, the response will contain multiple instances

of the requested Attribute, and therefore an additional pagination mechanism for

those temporal representations is required, in order to limit the time range of the

response. If no limits are specified, a default limit is enforced, depending on

implementation specific configurations. 

Temporal pagination can be done in ascending order using the _`firstN`_ parameter

and in descending order using the _`lastN`_ parameter, whose respective value (N) 

indicates the **limit**, i.e. the maximum number of temporal instances of any

Attribute allowed on a page. _`offset`_ is used to select the respective page

in the chosen order.

## 7.5 Counting results

Given that NGSI-LD Query operations can potentially return a result set