Types of node

Treeview works by examining files and other data and trying to see if they appear to be the kind of data it knows about. It then constructs the most specific type of node it can for each file (or whatever it is) that it has encountered. Below is a list of the types of node which it knows about, along with the icon used in the display, the Eligibility (type of node which Treeview will have a go at analysing to see if it is the node type in question) and a list of Detail views available in the detail panel when such a node is selected.

An NDF data structure.

Eligibility: Any HDS object, path name, or file with extension .sdf
Detail views: Overview, WCS grids for 2-d arrays, Image view for 2-d arrays

The WCS (World Coordinate System) component of an NDF data structure. This is an AST FrameSet which contains all the coordinate information concerning its data array.

Eligibility: A 1-d array of strings in the WCS component of an NDF data structure
Detail views: Overview, Text view, XML view, FITS view

A data array. This may represent either a simple HDS data array, an ARY structure, or an NDArray. The icons , and are used to represent arrays with one, two, or more than two dimensions respectively.

Eligibility: Any HDS object, path name, or file with extension .sdf
Detail views: Overview, Array data, Graph view for 1-d arrays, Image view for 2-d arrays

An HDS component of some kind. The icon is used if the component is scalar and hence has no internal structure.

Eligibility: Any HDS object, path name, or file with extension .sdf
Detail views: Overview, Array data, Graph view for 1-d arrays, Image view for 2-d arrays

A directory within the filesystem.

Eligibility: Any file
Detail views: Overview only

A normal file within the filesystem.

Eligibility: Any file
Detail views: Overview, File text if it looks like a text file

A FITS file.

Eligibility: Files with extensions .fit, .dst, .fits, .fts, .lilo, .lihi, .silo, .sihi, .mxlo, .mxhi, .rilo, .rihi, .vdlo, or .vdhi
Detail views: Overview only

A FITS generic Header plus Data Unit.

Eligibility: HDUs found inside FITS files
Detail views: Overview, Header cards

A FITS table HDU.

Eligibility: HDUs found inside FITS files
Detail views: Overview, header cards, table view

A FITS image HDU. The icons , and are used to represent arrays with one, two, or more than two dimensions respectively.

Eligibility: HDUs found inside FITS files
Detail views: Overview, Header cards, Array data, Graph view for 1-d arrays, WCS grid for 2-d arrays, Image view for 2-d arrays, Slice view for >2-d arrays

An AST SkyFrame object; this is a special type of AST Frame.

Eligibility: AST objects found inside the WCS component of NDFs
Detail views: Overview, Text view, XML view

An AST Frame object.

Eligibility: AST objects found inside the WCS components of NDFs
Detail views: Overview, Text view, XML view

A ZIP file, which is an archive that can contain, possibly compressed, a number of other files. Note that a JAR file is a special kind of ZIP file - Treeview makes no distinction.

Eligibility: Files with extensions .zip or .jar
Detail views: Overview only

An entry, which may represent a file or directory, in a ZIP or JAR archive.

Eligibility: Items found within a Zip archive
Detail views: Overview, Entry text if it looks like a text file

The History component of an NDF

Eligibility: An HDS object with the name HISTORY
Detail views: Overview only

Records within the History component of an NDF

Eligibility: Children of an NDF History component
Detail views: Overview only

An well-formed XML document

Eligibility: Any file
Detail views: Overview, Full text

An element within an XML document

Eligibility: A child of an XML document or element
Detail views: Overview, Full text

A comment within an XML document

Eligibility: A child of an XML document or element
Detail views: Overview only

An XML processing instruction

Eligibility: A child of an XML document or element
Detail views: Overview only

An XML CDATA marked section

Eligibility: A child of an XML element
Detail views: Overview only

An XML entity reference

Eligibility: A child of an XML element
Detail views: Overview only

An XML text node

Eligibility: A child of an XML element
Detail views: Overview only