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Re: Deciphering MDSchemaCopyMetaAttributesForAttribute()
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Re: Deciphering MDSchemaCopyMetaAttributesForAttribute()


  • Subject: Re: Deciphering MDSchemaCopyMetaAttributesForAttribute()
  • From: Vince DeMarco <email@hidden>
  • Date: Fri, 16 Dec 2005 08:48:52 -0800

The numbers correspond to the return values in CFGetType functions

For example

CFTypeID CFStringGetTypeID(void);
CFTypeID CFBooleanGetTypeID(void);
CFTypeID CFDateGetTypeID(void);
etc....

Don't hard code in 7,9 etc. into your programs.

Vince


On Dec 16, 2005, at 7:43 AM, Ryan Britton wrote:

When I did this, I was not able to find a reference of what the numbers returned for the type meant so I kind of had to do it through trial and error. Here are what I've come up with:


7 - String
9 - Boolean
10 - Numeric
11 - Date


On Dec 16, 2005, at 6:55 AM, Pierre Bernard wrote:

Hi!

The function MDSchemaCopyMetaAttributesForAttribute() is documented to return a dictionary with the following keys:

const CFStringRef kMDAttributeName;
const CFStringRef kMDAttributeType;
const CFStringRef kMDAttributeMultiValued;

The kMDAttributeType leads to "A CFNumberRef or CFTypeId describing the type of data returned as the value of the metadata attribute key."

What shall I make of this?
My understanding is that if I run into a CFTypeId then I may use CFCopyTypeIDDescription() to investigate further. Though I don't know what to expect.
What if I get a CFNumberRef? What does it mean?

TIA
Pierre Bernard

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References: 
 >Deciphering MDSchemaCopyMetaAttributesForAttribute() (From: Pierre Bernard <email@hidden>)
 >Re: Deciphering MDSchemaCopyMetaAttributesForAttribute() (From: Ryan Britton <email@hidden>)

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