The international dialing code is available for all telephone numbers

The digital book, whatever its language of writing, is an object that can be consulted, downloaded and shared from any point on the globe. It therefore goes without saying that all telephone numbers mentioned there must bear their international codes, so that contact is established without fail (particularly in the case of travel guides, directories, international manuals, professional books , or more generally contact information included in the body of the digital book).

Objectives

• Allow immediate use of telephone contact regardless of user context

Implementation

Start each phone number with the two-digit country code preceded by a plus symbol, for example "+33" for France. Replace the zero, which may appear as the first digit, with the country code. Present the telephone number as a series of pairs of numbers separated by a non-breaking space, where the first pair, corresponding to the country code, begins with a plus symbol, and the second pair contains only a figure, to harmonize the rest. For example, "+33 1 00 00 00 00".

Control

• For each phone number:
  • Check that the two-digit country code appears first, preceded by a plus symbol, for example "+33" for France.
  • Check that the zero, which may appear as the first digit, is replaced by the country code.
  • Check that in its overall form it is a sequence of pairs of numbers separated by a non-breaking space, where the first pair, corresponding to the country code, begins with a plus symbol, and the second pair contains only one digit. For example, "+33 1 00 00 00 00"
  .

Validation

• Needs to be human verified.