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# Quick Link Contract Riddle - PowerPoint PPT Presentation

Quick Link Contract Riddle. The graph below contains a few simple XDI statements, and a link contract that allows \$get operations on a certain subgraph . The purple area is the target subgraph of the link contract. ().

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Presentation Transcript

The graph below contains a few simple XDI statements, and a link contract that allows \$get operations on a certain subgraph.

The purple area is the target subgraph of the link contract.

()

The purple statements are the statements on which a \$get request will succeed using the given link contract.

=a

=a

*b

+friend

=a*b

=x

<+c>

=a*b<+c>

=x

&

\$do

=a*b<+c>&

\$get

&

\$do

“Markus”

The graph below discuses a case where link contract functionality intersects with \$ref/\$rep functionality.

The purple area is the target subgraph of the link contract.

()

The purple statements are the statements on which a \$get request will succeed using the given link contract.

[=]

[=]

!:uuid:1

[=]!:uuid:1

=a

\$ref

=a

*b

\$ref

=b

[=]!:uuid:1*b

=b

\$ref

=c

=c

\$rep

=d

=d

\$do

\$get

\$ref/\$rep behavior:

Will a \$get on =a*b succeed?

Will a \$get on =d*b succeed?

\$do