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DEVONthink stores a large number of metadata fields internally when importing documents from the file system, e.g., from PDF, RTF, MP3, EXIF/IPTC, HTML, and email messages as well as from all files that deliver metadata through the Spotlight metadata importer. Here's a partial list of theoretically supported fields: File Metadata General Metadata: Title Headline Subject Creator Producer Editor Contributor PDF Metadata: Author Title Subject URL Keywords RTF Metadata: Author Title Comment Subject URL Keywords Organization Copyright Email Metadata: Authors Author email addresses Recipients Recipient email addresses Email addresses Media and Publication Metadata: Album Composer Contributors Publishers Editors Organizations MultiMarkdown Metadata: title description author comment subject organization keywords publisher email copyright generator dc.title dc.creator dc.subject dc.description dc.rights dc.contributor dc.keywords dc.publisher og:title og:description geo.position ibcm PRO Custom Metadata Another powerful feature of DEVONthink is custom metadata fields. Specified in the Settings > Data, you can define fields that are meaningful to you, your company, your research group, or even your family! When you create a custom metadata field, you give it a name. DEVONthink uses this name to create an identifier for use in automated processes. This identifier is created automatically and cannot be changed. Data Types: When you define a custom field, you choose a data type for it. So what's a "data type"? It's simply a type of value; like "a" is a character and "42" is a (the!) number. The following data types are supported, including any interface items associated with them, e.g., checkboxes or dropdown menus: Boolean: This is a true or false value. Displayed as a checkbox. Countries: A dropdown menu providing a list of country names. Supports an Undefined state Languages: A dropdown menu providing a list of languages. Supports an Undefined state Integer: A whole number, e.g., with no fractional part, like 17. Decimal Number: A fractional number, represented with a decimal point. Date: Can be specified as Date & Time or Date. Identifier: Any alphanumeric value, specified as needed, e.g., a customer or patient number. Single-line Text: A dropdown providing a list of terms you defined for the field in the Data preferences. You can also type in a new value. Multi-line Text: Enter a small paragraph of text. Line breaks can be typed by pressing Option-Return. Rich Text: Same as Multi-line text but supports basic formatting, e.g., bold or italic text. Set: Similar to the Single-line text, this shows a dropdown with values pre-defined for the field in the Data preferences. However, new values can't be entered outside the preferences. Supports an Undefined state. URL: Accepts any valid URL, including filesystem URLs. Link: A special dropdown that allows you to choose an item in your databases. a link for the chosen item is used. Note there are metadata attributes that support an Undefined option: Countries, Languages, and Sets. This can be used anywhere custom metadata is displayed, e.g., in an item list column or the Data inspector. You can search for this by leaving the term empty, e.g., `mdcountry=` is equal to "The Country attribute is Undefined."
Note: The Countries and Languages lists are lengthy, but not necessarily exhaustive. For Multi-line Text and Rich Text, only one line will be displayed in its column in the item list.
Predefined Custom Metadata: In Settings > Data, we have provided some custom metadata fields to get you started. These are ready to use and explore and serve as great examples of the data types discussed above: Date Company Author Abstract Status Serial Number ISSN/ISBN Digital Object Identifier (DOI) PubMed ID PMC ID Barcode Format Category Subcategory Genre Country Language Price Tax Tip Decimal