Session catalog

The session catalog is the material catalog which provides session attributes for the request, as well as a default catId value for all src=, vignette=, and icc= commands.

The session catalog is specified as the first path element of the HTTP request path (immediately following the server name). If the first path element does not match attribute::RootId of any catalog, the default catalog is used as a session catalog.

The session catalog provides the following session default values:

Attribute

Notes

attribute::RootPath

Root path for material data files

attribute::VignettePath

Root path for vignette files

attribute::IccProfileRgb

Default working color space if a vignette does not embed an ICC profile

attribute::RootUrl

Root URL for relative HTTP file paths in src= commands

attribute::ShowOverlapObjs

Initial show/hide state for overlap objects

attribute::Expiration

Time-to-live value of the reply image for proxy server and browser caches

attribute::MaxPix

The maximum allowed reply image width and height

attribute::DefaultPix

Default values for wid= and hei=

attribute::Format

Default value for fmt=

attribute::JpegQuality

Default value for qlt=

attribute::TiffEncoding

Compression type for TIFF image output

attribute::Sharpen

Default value for sharpen=

attribute::OnFailSel

Specifies behavior when a sel= command fails

attribute::OnFailObj

Specifies behavior when an obj= command fails

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