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dtSearch Text Retrieval Engine Programmer's Reference
Automatically Detected Fields

Fields (metadata) that dtSearch automatically detects and indexes in documents.

For more information on file format support, see External link"What file formats does dtSearch Support? (dtsearch.com)"

The dtSearch Engine automatically detects fields in the following file formats:

File Format
Fields
Email files (Outlook Express, Eudora, MBOX, EML)
To, CC, BCC, From, Sent Via, Sender, Recipient, Subject, Date, Attachments
Outlook items and .MSG files
To, CC, BCC, From, Sent Via, Sender, Recipient, Subject, Date, Sent Date, Delivered Date, Attachments, contact fields (StreetAddress, CompanyName, etc.)
Microsoft Word, Excel, PowerPoint
Document summary information fields
OpenOffice/Open Document Format
Document properties fields
HTML
META tags; <TITLE> is indexed as HtmlTitle field; <H1>, <H2>, <H3> are indexed as HtmlH1, HtmlH2, HtmlH3, etc.
XML
All fields
DBF
All fields
CSV
All fields (CSV, or comma-separated values, files must have a .csv extension, a list of field names in the first line, and must use tab, comma, or semicolon delimiters)
PDF files
Document Properties
WordPerfect
Document summary information fields
AAC
MPEG4, XMP
AIFF
RIFF, XMP
APE
APEv2
FLAC
Vorbis
GIF
XMP
HEIF
EXIF, XMP
JPG
EXIF, IPTC, XMP
MP3
ID3
MOV
QuickTime, XMP
ASF (*.wmv, *.wma)
ASF tags
OGG
Vorbis
OPUS
Vorbis
PNG
EXIF, IPTC, XMP
TIF
EXIF, IPTC, XMP
WAV
RIFF, XMP
WEBP
RIFF, XMP

 

XMP, RIFF, Vorbis, and APEv2 metadata support applies to dtSearch versions 2023.02 and later. 

 

To prevent fields from being indexed in documents, set the dtsoFfSkipDocumentProperties flag in Options.FieldFlags. This setting does not affect CSV, XML, or DBF files. 

The NTFS file system supports file properties for other formats. Set the dtsoFfShowNtfsProperties flag in Options.FieldFlags to have the dtSearch Engine check for and index these properties, where present.