Task	Task	Effort	Connected	Notes
number	description	(SW)	with task(s)
1	Evaluate technologies	27		1
1.1	Globus	2	3.1, 2.3.1
1.2	GridPort	2
1.3	XML	5	2.1, 2.2, 2.4, 3.1, 3.2.4, 3.2.5	2
1.3.1	Discuss how well XML expresses our metadata	1
1.3.2	Evaluate existing uses of XML (AstroRes, RDL etc.)	1
1.3.3	Try out XML authoring tools	1
1.3.4	Try out XSLT transformations for metadata	1
1.3.5	Try out XML databases	1
1.4	SRB	2
1.4.1	Find out exactly what it can index and distribute	2	2.1, 2.2	3
1.5	JINI	4
1.5.1	Find out how it's aready being used in astronomy	1	2.1, 2.2.4
1.5.2	Demonstrate that it works intercontinentally	3
1.6	CORBA	3
1.6.1	Find out what support is available	1
1.6.2	Try a CORBA solution to the indexing problem	2	2.1	3
1.6.3	Find out if it links to other transports	1
1.7	SOAP	3
1.8	Agents	6
1.8.1	Agree what we mean by an "agent"	1		4
1.8.2	Decide what they can do for Astrogrid	2	2.1, 2.4
1.8.3	Build and operate agents using existing s/w kits	3		3, 5
2	Evaluate data architectures	27
2.1	Devise and evaluate indexing schemes	5	1.6, 1.5, 1.3, 2.1, 2.4	3
2.2	Evaluate metadata schemes	8	1.3, 2.4
2.2.1	Biliographic catalogues	1		6
2.2.2	Object catalogues	3		7
2.2.3	Catalogue queries	2		8
2.2.4	Coverage reports	2		9
2.3	Evaluate authentication schemes	9
2.3.1	Evaluate the Globus scheme	2	1.1
2.3.2	Evaluate competing schemes	5
2.3.3	Demonstrate that free and restricted data can mix on one grid	2
2.4	Evaluate upload methods	5		10
3	Build and operate trial data-grids	73		1
3.1	Use Globus + SRB	31	1.1, 1.3, 1.4, 2.1, 2.2, 2.3, 2.4
3.1.1	Choose data-centers and data-sets to include in trial	1
3.1.2	Deploy Globus at chosen data-centres	2		11
3.1.3	Deploy SRB at chosen data-centres	2		11
3.1.4	Connect SRB to data-sets	5		13
3.1.5	Equip client sites for pre-alpha tests	4		12
3.1.6	Develop client applications	10		14
3.1.7	Develop "Astrogrid kit" for client sites	2		15
3.1.8	Conduct beta tests	5
3.2	Use HTTP + CGI	11	2.1, 2.2, 2.3, 2.4	16
3.2.1	Start with existing CASU work	1
3.2.2	Add  more data-services	2		17
3.2.3	Add at least one "foreign" service as a proxy portal	2		18
3.2.4	Support more types of data (I.e. different metadata)	2
3.2.5	Adapt to use emerging choices for indexing schemes	2		3
3.2.6	Add prototype of upload methods	2		10
3.3	Use some other technologies	31	1.5, 1.6, 1.7, 2.1, 2.2, 2.3, 2.4
4	Final report	4
	Grand total	127	equal to	3.175	FTE