Method of controlling information on data links and apparatus for controlling information on data links
First Claim
1. A method of controlling information on data links, comprising the steps of:
- creating a data layer composed of a plurality of data blocks;
creating a link layer which holds link information about link relationships among said plurality of data blocks in said data layer; and
read locking a data block when a user refers to a data block in said data layer so that other users can read the data block and cannot modify the data block, and other users can read and modify the link information in said link layer which corresponds to the data block being referred to.
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Accused Products
Abstract
A method of controlling information on data links is provided which allows a user to establish a new link between a data which is being referred to by some other user or task and another data and to update and delete pieces of link information which has been established for the former data. A data layer composed of a plurality of data and a link layer for holding link information which represents link relationships among the plurality of data are disposed separately. In the case that a user refers to a data in the data layer except when link information in the link layer is being referred to or updated, other users are inhibited from modifying the data and are allowed to read the data. Furthermore, other users are allowed to read and modify the link information in the link layer which corresponds to the data being referred to.
27 Citations
19 Claims
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1. A method of controlling information on data links, comprising the steps of:
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creating a data layer composed of a plurality of data blocks; creating a link layer which holds link information about link relationships among said plurality of data blocks in said data layer; and read locking a data block when a user refers to a data block in said data layer so that other users can read the data block and cannot modify the data block, and other users can read and modify the link information in said link layer which corresponds to the data block being referred to. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for controlling information on data links, comprising:
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a data layer composed of a plurality of data blocks; a link layer which holds link information about link relationships among said plurality of data blocks in said data layer; a data block read lock means which inhibits other users from modifying a data block and allows the other users to read the data block; a data block write lock means which inhibits other users from modifying and reading a data block; a link information read lock means which inhibits other users from modifying link information corresponding to an origin data block and its destination data block and allows the other users to read the link information corresponding to the origin data block and its destination data block; and a link information write lock means which inhibits other users from modifying and reading the link information corresponding to an origin data block and its destination data block. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification