> ## Documentation Index > Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt > Use this file to discover all available pages before exploring further. # Document-Related Objects Compatibility with Version 10 > Document-related object API compatibility changes between ABBYY FineReader Engine 12 and 10 — DocumentStructure and PageStructure removed; layout-based access via FRPage. This section describes all changes to document-related objects which may require changes in the source code of your applications. * The API which provided access to the logical structure of the document (DocumentStructure, PageStructure and their subobjects) has been removed. Editing the properties and contents of the document via the deleted objects could have led to unpredictable results on export. If you need to verify or postprocess the recognition results, work with the data via the [Layout](/fine-reader/engine/api-reference/document-related-objects/frpage#layout) subobject of each [FRPage](/fine-reader/engine/api-reference/document-related-objects/frpage) and call any of the methods which perform document synthesis when done. The logical structure of the document will then be recreated and used at the export stage, although it will no longer be available for editing via FineReader Engine API. The future versions of ABBYY FineReader Engine may provide read-only access to some of the document logical structure.

Object/Enumeration	Property/Method/Constant	What has happened?	Comment
FRDocument	AddImage	Renamed	The new name of the method is AddImageDocument. This method has been renamed to make it clear that it works with ImageDocument, not an image file from disk.
	AddImageFileFromMemory	Input parameters number changed	The pointer to a memory buffer containing image data is passed as \_\_int64. This change has been made for 64-bit operating systems support. The variable fileFormat is no longer used as an input parameter. File format is determined using the fileName parameter. The following files can be opened from memory. PDF, DjVu (Windows) WDP (Windows) Because of this the method now receives the pointer to IImagePasswordCallback interface, which is necessary for opening password-protected PDF files. The method also receives an IntsCollection object specifying which pages of a multi-page file should be added.
	Analyze AnalyzePages	Input parameters number changed	These methods take as input parameters a set of subobjects of the PageProcessingParams object — only those parameters that are needed for page analysis are passed to these methods.
	AnalyzeAndRecognize AnalyzeAndRecognizePages	Removed	The same functionality is provided via the Process and ProcessPages methods of the FRDocument object with the PerformSynthesis property of the DocumentProcessingParams input parameter set to FALSE.
	Process	Input parameters number changed	The method receives all necessary parameters in one DocumentProcessingParams object.
IFRDocumentEvents	OnRecognizerTip	Renamed	The new name of the method is OnWarning. It can deliver warnings as well as recognizer tips to the client, and also process system messages to avoid the effect that the application "is not responding". It also has an additional parameter which specifies the index of the page in the document to which the warning refers.
Artefact BackgroundLayer Caption Captions DocumentElement DocumentSection DocumentStream DocumentStructure Footnote Footnotes FootnoteSeries FootnoteSeriesArray GlobalStyleStorage Incut IncutGroup IncutGroups MainText PageBlackSeparator PageElement PageElements PageSection PageSections PageStream PageStructure RunningTitle RunningTitleSeries RunningTitleSeriesArray RunningTitleSeriesText StreamElementLocationParams TextBarcode TextPicture TextTable TextTableCell		Removed	These objects represented the logical structure of the document and its various parts. Editing the document structure is no longer supported, as its incorrect use could affect the appearance of the exported document, and any text verification or other modifications may be performed via the document API (FRDocument, FRPage and subobjects). The future versions of ABBYY FineReader Engine may provide read-only access to some of the document logical structure.
BorderFlags CaptionPositionEnum DocumentElementTypeEnum FootnoteNumberingTypeEnum FrameHorizontalReferenceEnum FrameVerticalReferenceEnum PageBlackSeparatorRoleEnum PageBlackSeparatorTypeEnum PageElementTypeEnum StreamElementAlignmentEnum StreamTypeEnum TableCellVertAlignmentEnum TextTableSeparatorTypeEnum TextWrappingEnum		Removed	These enumerations were used by the document structure objects that are no longer available.
FRPage	Analyze AnalyzeRegion AnalyzeTable	Behavior changed	The methods take as input parameters a set of subobjects of the PageProcessingParams object — only those parameters that are needed for page analysis are passed to these methods. The Analyze method does not perform correction of page orientation, inversion, and geometrical distortions any more. Image preprocessing is a separate processing stage now. To correct orientation, inversion, geometrical distortion, use corresponding methods of the FRPage object, or perform all these operations as a whole using the IFRPage::Preprocess method.
	AnalyzeAndRecognize	Renamed	The new name of the method is PreprocessAnalyzeRecognize. The only difference from the old method is that now this method receives only one input parameter of the PageProcessingParams type, which contains all the necessary settings for processing.
	CorrectResolution	Removed	Use the IFRPage::DetectResolution and IImageDocument::ChangeResolution methods instead. This allows the user to check the resolution suggested by the DetectResolution method before applying it to the image. It may be that the proposed correction is so small that it is no use applying it. However, note that you can still correct the resolution automatically during preprocessing by setting the CorrectResolution property in PagePreprocessingParams.
	RemoveGeometricalDistortions	Removed	Use the IImageDocument::RemoveGeometricalDistortions method instead.
	Flush	Input parameters number changed	This method receives a boolean input parameter specifying whether the data should be saved to disk. This is useful in case the data is unchanged, because the method will work much quicker when saving is not required.
	FlushExt	Removed	The Flush method has the same signature as the FlushExt method.
IFRPageEvents	OnRecognizerTip	Renamed	The new name of the method is OnWarning. It can deliver warnings as well as recognizer tips to the client, and also process system messages to avoid the effect that the application "is not responding".
FRPages	Find Remove	Renamed	The new names of the methods are IndexOf, DeleteAt. Methods of all collections have been renamed to be uniform.
DocumentInformationDictionary	Add CreateDocumentInformationDictionaryItem Insert	Renamed	Use the AddNew method instead. Methods of all collections have been renamed to be uniform.
DocumentInformationDictionary	CopyFrom	Removed	This method is no longer supported. To copy the values of elements from another collection, you can add new elements to the collection using the AddNew method and specify the same values of elements.
AuthorsList	Add CreateAuthorInfo	Renamed	Use the AddNew method instead. Methods of all collections have been renamed to be uniform.
AuthorsList	Remove RemoveAll	Renamed	The new names of the methods are DeleteAt, DeleteAll. Methods of all collections have been renamed to be uniform.