A document field references a document contained in the current record's document library.  A document field can access many basic properties about the document, such as its name, as well as many calculated properties, such at its thumbnail URL.  A document field can also manipulate those properties in many ways.  Finally, a document field can add new files to the current record's document library either by importing them from other places, or by providing the content of a document to be created.  The many fields and functions which are available to perform these tasks are described below and in following pages.

The following read-only fields are available to access the properties of the document.  All of the properties will be null if no document is referenced by the field (the field is empty).  The functions listed on following pages describe ways to edit the values returned by these properties.

Field Name	Data Type	Description
contentSize	Integer	The size, in bytes, of the document.
contentTimestamp	DateTime	The date and time the content of the document was last changed.
contentType	String	The MIME type of this document.  MIME types have the form of basic-type/specific-type with an optional character set indentifier for text documents.  For instance, an HTML document has a MIME type of "text/html" or with the character set identified, something like "text/html; charset=UTF8".  For a GIF image the MIME type is "image/gif".  A list of supported character encodings is available within Oracle's Java documentation.
createdEmail	String	The email address of the user who first created this document
createdFirstName	String	The first name of the user who first created this document
createdLastName	String	The last name of the user who first created this document
createdTimestamp	DateTime	The date and time this document was first created
createdUsername	String	The username of the user who first created this document
createdCredential	String	The professional credential, as of the creation timestamp, of the user who first created this document.  Credentials are an optional feature that may not be enabled for your organization.
davURL	String	The URL which allows DAV access to this document.  The DAV URL is based on the path and name of the document and will change if the document is moved or renamed.  It will also change if a folder containing the document is moved or renamed.  Because of this you should usually use the permURL property in preference to the DAV URL unless DAV capabilities are specifically needed.
displayHTML	String	The same HTML that would be generated if the document were inserted into a merge report.  Casting the field to a String produces the same result
filename	String	The filename of the document.
folder	Folder	Gets the folder containing the document.  Folders are documented in the getDocumentLibrary(...) function.
fullPath	String	Gets the combined path and filename of the document.
imageHeight	Integer	The image height in pixels.  If the document is not recognised as being an image the value is null.
imageWidth	Integer	The image width in pixels.  If the document is not recognised as being an image the value is null.
linkHTML	String	The name of the document with a pop-up link to open the document.
modifiedEmail	String	The email address of the user who last modified this document
modifiedFirstName	String	The first name of the user who last modified this document
modifiedLastName	String	The last name of the user who last modified this document
modifiedTimestamp	DateTime	The date and time when this document was last modified.
modifiedUsername	String	The username of the user who last modified this document
modifiedCredential	String	The professional credential, as of the modification timestamp, of the user who last modified this document.  Credentials are an optional feature that may not be enabled for your organization.
notes	String	The contents of the notes field of the document
path	String	The path of this document relative to the root folder of current record's document library.
permURL	String	The permanent URL of this document.  Although renaming the document will change this value, the old value will still work but result in a document with the old name.
referenceCount	Integer	The number of document fields with a saved reference to the document.  This means that for pre-edit formulas, field formulas and pre-save formulas the current field's reference may, or may not, be included depending on whether the field value has just been changed.  For post-save formulas the current field's reference will always be included.
versioned	Boolean	Indicates whether the document is versioned or not.

Documents also have many functions: