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Figure 1 – The Framework of Open Data

The open data portal is the key part of open data which meets several goals:
 Offer a "one‐stop‐shop" experience to data consumers, saving the trouble of collecting data
from various portals, authorities or offices with different controls and settings;
 Make it as easy as possible for government data stewards to make their datasets available for
public consumption.
The open data portal provide four type of services, the data catalog for data sets browsing and
searching, the open data service including data downloading, visualization and analysis as well as
API access, the APP services and service center. Application developers access data through APIs
like representational state transfer (REST), simple object access protocol (SOAP) or remote
procedure call protocol (RPC). These developers create new web/mobile applications to facilitate
service consumer and constitute and important part of the data industrial chain.
The use of data sets and App services can help users to obtain top recommended resources and
applications that they may have a great of interest. Also, users can click on "More" buttons to the
demo page.

(1) Open data portal
Data catalog

 Provide some levels of presentation, including unified list and isolated resource;
 Provide some levels of the classification system;
 Provide keyword and resource type to search;

696 ITU‐T's Technical Reports and Specifications