XPS Documents Glossary

• advance width
  The distance from the origin of one glyph to the origin of the next glyph.

• bidi level
  See definition for: bidirectional text level.

• bidi text level
  See definition for: bidirectional text level.

• bidirectional nesting level
  See definition for: bidirectional text level.

• bidirectional text level
  The value that specifies the current text direction.

• bleed box
  The area that includes crop marks and extends outside the physical page.

• color channel
  One of several independent colors that are combined to define a final color value.

• color interpolation
  The conversion of a color value that is defined in one color system for use in another color system.

• deep copy
  The operation that copies not only the object but also all of the contents that are referenced by the object.

• device font
  A font that is supported directly on a device (such as a printer).

• DigestMethod
  The algorithm that is used to compute a digital signature.

• dirty
  Of, pertaining to, or characteristic of the condition where something has changed in memory but the change has not been saved to a more permanent storage device such as a disk.

• discardable resource parts
  Package parts that are listed in the DiscardControl part. Per XML Paper Specification, in an XPS document the DiscardControl part contains a list of resources that can be discarded in a resource-constrained environment.

• escape sequence
  A sequence of printable characters that are used to replace an unprintable or reserved character in a string.

• escaped name
  A text string where each reserved or unprintable character has been replaced by a sequence of characters called an escape sequence.

• escaped string
  A string where special and non-printable characters have been replaced with escape sequence strings.

• fixed document
  The XPS document part that describes the sequence of FixedPage parts.

• fixed document sequence
  The XPS document part that describes the sequence of FixedDocument parts.

• fixed page
  The XPS document part that describes the content of a page in a fixed document.

• font collection
  A collection of font resources in an XPS document.

• font embedding
  The process of including font resources in a document.

• font entry
  For font resources that contain multiple fonts, this is the index of an individual font.

• font resource
  The resource in an XPS document that contains the font information.

• glyph run
  A continuous run of characters that share a common format.

• gradient path
  In a linear gradient, the line that is perpendicular to the change in color from one gradient point to another. In a radial gradient, a line between the gradient origin and the ellipse that bounds the gradient region.

• gradient region
  Inside a geometry, the area in which the gradient is defined.

• gradient stop
  A specific color that is defined for a location within the gradient region. Gradient stops are used to define the color at specific locations along the gradient path.

• image brush
  A brush that uses an image to fill an area or shape.

• image resource
  A document resource that contains an image that is used in a document.

• incomplete signature
  A signature that is invalid because it is missing a required component.

• incompliant signature
  A signature that is invalid because it is not constructed properly.

• in-memory document
  A group of XPS document components that have been created or modified in memory but have not been saved to a permanent storage medium such as a disk.

• language tag string
  A string that identifies a specific language.

• obfuscating a font
  Making the font name and resource contents more difficult to extract and copy.

• part interleaving
  In an XPS document, the process of breaking down document parts into smaller physical components that provide more efficient data transfer in some usage scenarios.

• path
  A single two-dimensional shape that is made up of one or more line segments.

• print ticket
  An object that contains information about how to format document content for printing or viewing.

• PrintCapabilities
  A structured description, formatted as XML data, of the features supported by a printer.

• PrintTicket
  A structured description of the printer features and settings that are used for printing a document or a portion of a document, such as a page. PrintTicket objects can be stored as document parts or memory streams.

• PrintTicket part
  An XPS document part that contains a print ticket.

• segment data array
  An array of data values that describes the segments in a path.

• segment types array
  An array of data values that describes the segment types that are listed in a segment data array.

• signature intent string
  The text string that describes the implications of signing a document.

• signature method
  The algorithm that is used to compute the hash value of a digital signature.

• signature request
  A request to sign an XPS document.

• signing spot
  The location on a page where a signature request block is to be displayed.

• spread area
  In a geometry that contains a gradient, the area inside the geometry that lies outside the gradient region.

• unescaped name
  A name expressed as a text string in which unprintable and reserved characters (such as space and tab) have not been replaced by escape sequences.

• XPS document
  An OPC package that conforms to the XML paper specification. An XPS document can be stored as a file or a memory stream.

• XPS Object Model
  The rules that guide the relationships between the XPS document objects that describe the contents of an XPS document.

• XPS object model document tree
  The hierarchical relationship of the objects in the XPS document API.

• XPS OM
  The programming objects whose relationships are defined by the XPS Object Model.

• XPS package
  An XPS document that is saved to a file as an OPC package that complies with the XML Paper Specification.

• XPSDrv
  A printer driver or a printer driver component that supports the XPS print path that was introduced in Windows Vista.