关于Content-Type的一张表

Message Types (mostly email)
MIME message			message/rfc822
Partial message			message/partial
Message containing external references			message/external-body
Message containing USENET news			message/news
HTTP message			message/http
2D/3D Data/Virtual Reality Types
VRML data file	wrl vrml		x-world/x-vrml(changing to model/vrml)
WIRL – VRML data (VREAM)	vrw		x-world/x-vream
Play3D 3d scene data (Play3D)	p3d		application/x-p3d
Viscape Interactive 3d world data (Superscape)	svr		x-world/x-svr
WebActive 3d data (PlasticThought)	wvr		x-world/x-wvr
QuickDraw3D scene data (Apple)	3dmf		x-world/x-3dmf
Scientific/Math/CADTypes
Chemical types — to communicate information about chemical models			chemical/* (several subtypes)
Mathematica notebook	ma		application/mathematica
Computational meshes for numerical simulations	msh		x-model/x-mesh(evolving to model/mesh)
Vis5D 5-dimensional data	v5d		application/vis5d
IGES models — CAD/CAM (CGM) data	igs		application/iges(evolving to model/iges?)
Autocad WHIP vector drawings	dwf		drawing/x-dwf
Largely Platform-Specific Types
Silicon Graphics Specific Types
Showcase Presentations	showcase slides sc sho show		application/x-showcase
Insight Manual pages	ins insight		application/x-insight
Iris Annotator data	ano		application/x-annotator
Directory Viewer	dir		application/x-dirview
Software License	lic		application/x-enterlicense
Fax manager file	faxmgr		application/x-fax-manager
Fax job data file	faxmgrjob		application/x-fax-manager-job
IconBook data	icnbk		application/x-iconbook
?	wb		application/x-inpview
Installable software in ‘inst’ format	inst		application/x-install
Mail folder	mail		application/x-mailfolder
?	pp ppages		application/x-ppages
Data for printer (via lpr)	sgi-lpr		application/x-sgi-lpr
Software in ‘tardist’ format	tardist