Supported metadata type in PDLP

This page indicates the types of metadata supported by OPSWAT PDLP for each type of file. A list of these metadata can be found below:

	File Type	Metadata
1	gif	XMP
2	tiff	XMP, EXIF
3	bmp	XMP
4	jpeg*	XMP, EXIF
5	png	XMP
6	pdf	built-in properties, custom properties
7	xls	built-in properties, custom properties
8	xlsx	built-in properties, custom properties
9	xlm	built-in properties, custom properties
10	xml_xls	built-in properties, custom properties
11	ppt	built-in properties, custom properties
12	pot	built-in properties, custom properties
13	pps	built-in properties, custom properties
14	pptx	built-in properties, custom properties
15	potx	built-in properties, custom properties
16	ppsx	built-in properties, custom properties
17	pptm	built-in properties, custom properties
18	potm	built-in properties, custom properties
19	ppsm	built-in properties, custom properties
20	rtf	built-in properties, custom properties
21	doc	built-in properties, custom properties
22	docx	built-in properties, custom properties
23	docm	built-in properties, custom properties
24	odt	built-in properties, custom properties
25	ods	built-in properties, custom properties
26	xml_doc	built-in properties, custom properties
27	xml_docx	built-in properties, custom properties

The following list will provide a more detailed description of each of the metadata:

XMP (Extensible Metadata Platform): if available, except for the jpeg format, which requires some information to be retained in order to maintain the quality of the original image.
EXIF (Exchangeable Image File Format): if available, except for the jpeg format, which requires some information to be retained in order to maintain the quality of the original image.
Built-in properties: In cases where it is applicable; title, creator, subject, company, description manager, comment, producer, creationDate, modDat.
Custom properties: In cases where it is applicable; Extensible Metadata Platform such as the following: title, language, creators, contributors, rights, coverage, date, description, identifier, publisher, relation, source, subject, type, title, creator, lastModifiedBy, Company, revision, created, modified, codepage, author, keywords, comments, template, lastsaved by, revisionnumber, total edit_time, last_ printed, create_time, last_saved_time, num_pages, num_words, num_chars, thumbnail, creating_application, security, codepage_doc, category, presentation_target, bytes, lines, paragraphs, slides, notes, hidden_slides, mm_clips, scale_crop, heading_pairs, titles_of_parts, manager, company, links_dirty, chars_with_spaces, unused, shared_doc, link_base, hlinks, hlinks_changed, version, dig_sig, content_type, content_status, doc_version, and other fields that can be represented in xmp metadata (like user defined properties)

*In order to maintain the quality of the original image, some fields must be preserved. The following is a list of exceptions that are allowed for jpeg fields in metadata: quality, horizontal resolution, vertical resolution, resolution units, DPI info, bits per channel, CMYK color profile, color type, compression type, horizontal sampling, vertical sampling, palette, preblend alpha (if present), RGB color profile, sample rounding mode, color space, brightness value, contrast, compressed bpp, gain control, gamma, saturation, sharpness, orientation, white balance.

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