great symbol shift

Introduction

This branch implements the "Great Symbol Shift".

This refers to a change to the XDI graph model in which context symbols have shifted as follows:

• @ -> +
• + -> #
• # -> @

Examples

Before the Great Symbol Shift:

@projectdanube=markus[<+email>]<#0>&/&/"myemail1@test.com"
@projectdanube=markus[<+email>]<#1>&/&/"myemail2@test.com"
@projectdanube=markus[<+email>]<#2>&/&/"myemail3@test.com"

After the Great Symbol Shift:

+projectdanube=markus[<#email>]<@0>&/&/"myemail1@test.com"
+projectdanube=markus[<#email>]<@1>&/&/"myemail2@test.com"
+projectdanube=markus[<#email>]<@2>&/&/"myemail3@test.com"

Status

Merged per 946b5c8 on 4th Apr 2014 into 0.2-SNAPSHOT after snapshot-0.2-pre-symbol-shift.

Sample deployment before merge: https://server.xdi2.org/pre-symbol-shift

Code Migration

The xdi2.core.constants package encapsulates most of the functionality affected by the Great Symbol Shift.

Graph Migration

Graphs can be migrated using the xdi2-tools.