| CPC G06Q 50/01 (2013.01) [G06Q 30/06 (2013.01); G06Q 50/184 (2013.01)] | 4 Claims |

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1. A content selling system, comprising:
a content market configured to sell digital content items, one or more of the digital content items, each of which includes one or more components, produced by members of a community;
member terminals;
a management server that includes a content communication device and is configured to communicate with the member terminals, each of which includes a display, the member terminals being possessed by each of the two or more members, respectively;
a user terminal possessed by a user purchasing one of the digital content items from the content market; and
a content database configured to store data of a graph structure that includes a plurality of triplets,
wherein:
in the content data base, each of the triplets includes one node and two edges associated with the one node;
the triplets are connected with one another via the two edges of the each of the triplets;
each of the edges indicates relationship between the nodes included in two of the triplets;
one of the nodes comprises data of one of the digital content items to be sold;
another one of the nodes comprises data of the one or more of the components;
another one of the nodes comprises data of a selling price of one of the digital content items; and
the display of the each of the member terminals is configured to display a graph based on the data of the graph structure; and
the management server includes a processor and a storage, and that accesses the content database, the member terminals, and the user terminal, thereby assisting sales of the digital content items in the content market.
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