OLE Property Set - Revision history

Jsummers: /* Related formats */

2018-07-27T14:34:23Z

‎Related formats

Jsummers at 15:33, 23 July 2018

2018-07-23T15:33:20Z

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Serialization }} '''OLE Property Set''' is a Microsoft serialization and metadata format. It does not typically appear in a file by..."

2018-07-19T14:30:56Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Serialization }} '''OLE Property Set''' is a Microsoft serialization and metadata format. It does not typically appear in a file by..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Serialization
}}
'''OLE Property Set''' is a Microsoft serialization and metadata format. It does not typically appear in a file by itself, but is used in some file formats, especially formats based on [[Microsoft Compound File]] format.

== Disambiguation ==
'''OLE Property Set Storage''' is a particular kind of [[Microsoft Compound File]] that contains Property Sets. '''OLE Structured Storage''' apparently means something similar, or it might refer to the related APIs and ecosystem.

== Format details ==
Each property is identified by a coded integer, but (with a few exceptions) the codes are not unique. Each property set has an "FMTID" field containing a [[GUID]], which must be taken into account to make sense or the properties. Some FMTIDs and their associated properties are defined in the main specification, but for most you must look elsewhere.

Though the format implies that big-endian [[Endianness|byte order]] could be possible, the modern specification only allows little-endian byte order.

== Identification ==
A Property Set usually begins with bytes {{magic|0xfe 0xff}}.

This field is named "ByteOrder", but be careful. While it resembles a UTF-16 [[Byte Order Mark]], it works in the exact opposite way.

== Related formats ==
* In a [[Microsoft Compound File]], some streams contain an OLE Property Set.
* In a [[JPEG]] file, some FPXR segments contain an OLE Property Set.
* [[TIFF]] tag 37680 contains an embedded OLE Property Set Storage document.

== Specifications ==
* [https://msdn.microsoft.com/en-us/library/dd942421.aspx [MS-OLEPS]: Object Linking and Embedding (OLE) Property Set Data Structures]
* [https://docs.microsoft.com/en-us/windows/desktop/stg/predefined-property-set-format-identifiers Microsoft Docs: Predefined Property Set Format Identifiers]

[[Category:Microsoft]]
[[Category:Microsoft Compound File]]
[[Category:Metadata]]

@@ Line 24: / Line 24: @@
 * In a [[JPEG]] file, some FPXR segments contain an OLE Property Set stream.
 * [[TIFF]] tag 37680 contains an embedded OLE Property Set Storage document.
 == Specifications ==

@@ Line 7: / Line 7: @@
 == Disambiguation ==
 '''OLE Property Set Storage''' is a particular kind of [[Microsoft Compound File]] that contains Property Sets. '''OLE Structured Storage''' apparently means something similar, or it might refer to the related APIs and ecosystem.
 == Format details ==
-Each property is identified by a coded integer, but (with a few exceptions) the codes are not unique. Each property set has an "FMTID" field containing a [[GUID]], which must be taken into account to make sense or the properties. Some FMTIDs and their associated properties are defined in the main specification, but for most you must look elsewhere.
+Each property is identified by a coded integer, but (with a few exceptions) the codes are not unique. Each property set has an "FMTID" field in the form of a [[GUID]], which must be taken into account to make sense or the properties. Some FMTIDs and their associated properties are defined in the main specification, but for most you must look elsewhere. Sometimes there is a "Dictionary" segment that reveals the names of the properties.
 Though the format implies that big-endian [[Endianness|byte order]] could be possible, the modern specification only allows little-endian byte order.
 == Identification ==
-A Property Set usually begins with bytes {{magic|0xfe 0xff}}.
+A Property Set stream usually begins with bytes {{magic|0xfe 0xff}}.
 This field is named "ByteOrder", but be careful. While it resembles a UTF-16 [[Byte Order Mark]], it works in the exact opposite way.
 == Related formats ==
-* In a [[Microsoft Compound File]], some streams contain an OLE Property Set.
+* In a [[Microsoft Compound File]], some streams contain an OLE Property Set stream.
-* In a [[JPEG]] file, some FPXR segments contain an OLE Property Set.
+* In a [[JPEG]] file, some FPXR segments contain an OLE Property Set stream.
 * [[TIFF]] tag 37680 contains an embedded OLE Property Set Storage document.