Xmp ActiveX Reference Documentation

Xmp

Current Version: 10.1.2

Requires Chilkat Bundle License

Chilkat XMP is a software component (SDK, toolkit, library, etc) for accessing, manipulating, and adding XMP metadata to JPEG and TIFF files.

Object Creation

Note:
For versions of Chilkat < 10.0.0, use "Chilkat_9_5_0.Xmp" instead of "Chilkat.Xmp"
For a specific major version, use "Chilkat.Xmp.<major_version>", such as "Chilkat.Xmp.10" for Chilkat v10.*.*
See Chilkat ActiveX Object Creation

(ASP)
set obj = Server.CreateObject("Chilkat.Xmp")

(AutoIt)
$obj = ObjCreate("Chilkat.Xmp")

(Visual Basic 6.0)
Dim obj As New ChilkatXmp

(VBScript)
set obj = CreateObject("Chilkat.Xmp")

(Delphi)
obj := TChilkatXmp.Create(Self);

(FoxPro)
loObject = CreateObject('Chilkat.Xmp')

(PowerBuilder)
lole_object = create oleobject
li_rc = lole_object.ConnectToNewObject("Chilkat.Xmp")

(SQL Server)
EXEC @hr = sp_OACreate 'Chilkat.Xmp', @obj OUT

(Javascript)
var obj = new ActiveXObject("Chilkat.Xmp");

Properties

DebugLogFilePath

DebugLogFilePath As String

If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.

Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.

Possible causes of hangs include:

A timeout property set to 0, indicating an infinite timeout.
A hang occurring within an event callback in the application code.
An internal bug in the Chilkat code causing the hang.

More Information and Examples

(AutoIt) Example showing how to use DebugLogFilePath.(Classic ASP) Example showing how to use DebugLogFilePath.(PowerBuilder) Example showing how to use DebugLogFilePath.(SQL Server) Example showing how to use DebugLogFilePath.(VBScript) Example showing how to use DebugLogFilePath.(Visual Basic 6.0) Example showing how to use DebugLogFilePath.(Visual FoxPro) Example showing how to use DebugLogFilePath.

LastBinaryResult

LastBinaryResult As Variant (read-only)

This property is mainly used in SQL Server stored procedures to retrieve binary data from the last method call that returned binary data. It is only accessible if Chilkat.Global.KeepBinaryResult is set to 1. This feature allows for the retrieval of large varbinary results in an SQL Server environment, which has restrictions on returning large data via method calls, though temp tables can handle binary properties.

LastErrorHtml

LastErrorHtml As String (read-only)

Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

LastErrorText

LastErrorText As String (read-only)

Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

More Information and Examples

Concept of LastErrorText LastErrorText Standard Information

LastErrorXml

LastErrorXml As String (read-only)

Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

LastMethodSuccess

LastMethodSuccess As Long

Indicates the success or failure of the most recent method call: 1 means success, 0 means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages.

LastStringResult

LastStringResult As String (read-only)

In SQL Server stored procedures, this property holds the string return value of the most recent method call that returns a string. It is accessible only when Chilkat.Global.KeepStringResult is set to TRUE. SQL Server has limitations on string lengths returned from methods and properties, but temp tables can be used to access large strings.

More Information and Examples

Long Strings Returned by ActiveX Methods in SQL Server

LastStringResultLen

LastStringResultLen As Long (read-only)

The length, in characters, of the string contained in the LastStringResult property.

NumEmbedded

NumEmbedded As Long (read-only)

The number of XMP metadata documents found within the JPG or TIFF file loaded by LoadAppFile.

StructInnerDescrip

StructInnerDescrip As Long

Determines whether structures are stored with rdf:parseType="Resource", or within an "rdf:Description" sub-node.

UncommonOptions

UncommonOptions As String

Introduced in version 9.5.0.80

A property to be used for future uncommon needs. The default value is the empty string.

VerboseLogging

VerboseLogging As Long

If set to 1, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is 0. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

Version

Version As String (read-only)

Version of the component/library, such as "10.1.0"

More Information and Examples

(AutoIt) How to get the Chilkat version at runtime.(Classic ASP) How to get the Chilkat version at runtime.(PowerBuilder) How to get the Chilkat version at runtime.(SQL Server) How to get the Chilkat version at runtime.(VBScript) How to get the Chilkat version at runtime.(Visual Basic 6.0) How to get the Chilkat version at runtime.(Visual FoxPro) How to get the Chilkat version at runtime.

Methods

AddArray

AddArray(xml As ChilkatXml, arrType As String, propName As String, values As CkStringArray) As Long

Adds or replaces an XMP property array. The XMP metadata to be updated is contained in the XML object passed in the 1st argument. The 2nd argument specifies the array type, which can be "bag", "seq", or "alt". The property name should be prefixed with the namespace, such as "dc:subject".

More Information and Examples

(AutoIt) XMP Array Property - Bag, Seq, or Alt (Classic ASP) XMP Array Property - Bag, Seq, or Alt (PowerBuilder) XMP Array Property - Bag, Seq, or Alt (SQL Server) XMP Array Property - Bag, Seq, or Alt (VBScript) XMP Array Property - Bag, Seq, or Alt (Visual Basic 6.0) XMP Array Property - Bag, Seq, or Alt (Visual FoxPro) XMP Array Property - Bag, Seq, or Alt

AddNsMapping

AddNsMapping(ns As String, uri As String)

Adds a namespace to URI mapping. When a property is added via AddSimpleString or any of the other methods, the property name is namespace qualified. When adding the first property in a namespace, the rdf:Description is automatically added and the URI is obtained from the namespace-to-URI mappings. The standard (and commonly used) namespace mappings are defined by default. This is only used if the namespace is custom or not already handled.

AddSimpleInt

AddSimpleInt(iXml As ChilkatXml, propName As String, ByVal propVal As Long) As Long

Adds or updates an XMP integer property. The XMP metadata to be updated is contained in the XML object passed in the 1st argument. The property name should be prefixed with the namespace, such as "tiff:XResolution".

AddSimpleStr

AddSimpleStr(iXml As ChilkatXml, propName As String, propVal As String) As Long

Adds or updates a simple XMP string property. The XMP metadata to be updated is contained in the XML object passed in the 1st argument. The property name should be prefixed with the namespace, such as "photoshop:Credit".

AddStructProp

AddStructProp(iChilkatXml As ChilkatXml, structName As String, propName As String, propValue As String) As Long

Adds or updates an XMP structured property value. The XMP metadata to be updated is contained in the XML object passed in the 1st argument. The structure name should be prefixed with the namespace, such as "Iptc4xmpCore:CreatorContactInfo". The property name within the structure should also be prefixed with the namespace, such as "Iptc4xmpCore:CiAdrCity".

Append

Append(iXml As ChilkatXml) As Long

Appends a new XMP metadata file to the XMP object. Any XMPs appended via this method will be present in the file when SaveAppFile is called. Files containing XMP metadata typically only include a single XMP document, so this method is usually only called when adding XMP metadata to a file for the first time.

GetArray

GetArray(iXml As ChilkatXml, propName As String) As CkStringArray

Finds and returns an XMP array property. The property name should be prefixed with the namespace, such as "dc:subject".

Returns Nothing on failure

GetEmbedded

GetEmbedded(ByVal index As Long) As ChilkatXml

Returns the Nth embedded XMP document as a Chilkat XML object.

Returns Nothing on failure

More Information and Examples

(AutoIt) Extract XMP MetaData as XML (Classic ASP) Extract XMP MetaData as XML (PowerBuilder) Extract XMP MetaData as XML (SQL Server) Extract XMP MetaData as XML (VBScript) Extract XMP MetaData as XML (Visual Basic 6.0) Extract XMP MetaData as XML (Visual FoxPro) Extract XMP MetaData as XML

GetProperty

GetProperty(iXml As ChilkatXml, propName As String) As ChilkatXml

To be documented soon...

Returns Nothing on failure

GetSimpleInt

GetSimpleInt(iXml As ChilkatXml, propName As String) As Long

Finds and returns an XMP integer property. The property name should be prefixed with the namespace, such as "tiff:ResolutionUnit".

GetSimpleStr

GetSimpleStr(iXml As ChilkatXml, propName As String) As String

Finds and returns an XMP simple string property. The property name should be prefixed with the namespace, such as "photoshop:Source".

Returns Nothing on failure

More Information and Examples

(AutoIt) Get a String Property Value from XMP (Classic ASP) Get a String Property Value from XMP (PowerBuilder) Get a String Property Value from XMP (SQL Server) Get a String Property Value from XMP (VBScript) Get a String Property Value from XMP (Visual Basic 6.0) Get a String Property Value from XMP (Visual FoxPro) Get a String Property Value from XMP

GetStructPropNames

GetStructPropNames(iXml As ChilkatXml, structName As String) As CkStringArray

Returns the property names used by an exsting structure within an XMP document. The contents of the structure can be retrieved by calling GetStructValue for each property name returned by GetStructPropNames.

Returns Nothing on failure

GetStructValue

GetStructValue(iXml As ChilkatXml, structName As String, propName As String) As String

Returns the value of a single item within an XMP structure property. Property names should always be prefixed with the namespace.

Returns Nothing on failure

More Information and Examples

(AutoIt) Get a Structure Property Value from XMP (Classic ASP) Get a Structure Property Value from XMP (PowerBuilder) Get a Structure Property Value from XMP (SQL Server) Get a Structure Property Value from XMP (VBScript) Get a Structure Property Value from XMP (Visual Basic 6.0) Get a Structure Property Value from XMP (Visual FoxPro) Get a Structure Property Value from XMP

LoadAppFile

LoadAppFile(filename As String) As Long

Loads a TIFF or JPG file into the XMP object.

LoadFromBuffer

LoadFromBuffer(fileData As Variant, ext As String) As Long

Loads a JPG or TIFF from an byte buffer containing the image file data.

NewXmp

NewXmp() As ChilkatXml

Creates and returns a new/empty XMP metadata document as a Chilkat XML object.

Returns Nothing on failure

More Information and Examples

(AutoIt) Add XMP MetaData to JPG or TIFF (Classic ASP) Add XMP MetaData to JPG or TIFF (PowerBuilder) Add XMP MetaData to JPG or TIFF (SQL Server) Add XMP MetaData to JPG or TIFF (VBScript) Add XMP MetaData to JPG or TIFF (Visual Basic 6.0) Add XMP MetaData to JPG or TIFF (Visual FoxPro) Add XMP MetaData to JPG or TIFF

RemoveAllEmbedded

RemoveAllEmbedded() As Long

Removes all XMP metadata documents from an XMP object. After calling this method, call SaveAppFile to rewrite the JPG or TIFF file with the XMP metadata removed.

Returns 1 for success, 0 for failure.

RemoveArray

RemoveArray(iXml As ChilkatXml, propName As String) As Long

Removes an XMP array property from the XMP document.

RemoveEmbedded

RemoveEmbedded(ByVal index As Long) As Long

Removes a single XMP metadata document from the JPG or TIFF file. Call SaveAppFile to persist the changes to disk.

Returns 1 for success, 0 for failure.

RemoveNsMapping

RemoveNsMapping(ns As String)

Removes a namespace-to-URI mapping.

RemoveSimple

RemoveSimple(iXml As ChilkatXml, propName As String) As Long

Removes a simple XMP property from the XMP document.

RemoveStruct

RemoveStruct(iXml As ChilkatXml, structName As String) As Long

Removes an XMP structure property from the XMP document.

RemoveStructProp

RemoveStructProp(iXml As ChilkatXml, structName As String, propName As String) As Long

Removes a single member from an XMP structured property.

SaveAppFile

SaveAppFile(filename As String) As Long

Persists all changes made to the XMP document(s) by saving the XMP object to a file. Changes made by adding, updating, or removing properties are not persisted to the filesystem until this is called.

SaveToBuffer

SaveToBuffer() As Variant

Saves a JPG or TIFF image with updated XMP to a byte buffer.

Returns a zero-length byte array (as a Variant) on failure.
An empty array will have a UBound of -1 meaning 0 elements.