CORE DATA objectId changes constantly

Question

I have some data that I export into an XML file and put in a remote FTP Server.

I have to identified each object with a unique attribute, it doesn\'t matter wich is,

Answer 1

I think this maybe a reporting problem. The numbers you show that are supposed to be a URI/UUID are way, way to short.

They should look like:

UUIDs (Universally Unique Identifiers), also known as GUIDs (Globally Unique Identifiers) or IIDs (Interface Identifiers), are 128-bit values guaranteed to be unique. A UUID is made unique over both space and time by combining a value unique to the computer on which it was generated—usually the Ethernet hardware address—and a value representing the number of 100-nanosecond intervals since October 15, 1582 at 00:00:00.

The standard format for UUIDs represented in ASCII is a string punctuated by hyphens, for example 68753A44-4D6F-1226-9C60-0050E4C00067. The hex representation looks, as you might expect, like a list of numerical values preceded by 0x. For example, 0xD7, 0x36, 0x95, 0x0A, 0x4D, 0x6E, 0x12, 0x26, 0x80, 0x3A, 0x00, 0x50, 0xE4, 0xC0, 0x00, 0x67 . To use a UUID, you simply create it and then copy the resulting strings into your header and C language source files. Because a UUID is expressed simply as an array of bytes, there are no endianness considerations for different platforms.

I think you're seeing different values because your only getting a piece, and a different piece at that, each time you check the UUID. Represented as a URI, they should look more like a URL. They definitely won't look like an integer.