Abstract: Methods, systems, and devices for data management are described. A data management system (DMS) may receive a request to access metadata stored in a distributed metadata repository. The request may have a first semantic format compatible with a first version of the distributed metadata repository. The DMS may translate the first semantic format of the request to a second semantic format compatible with a second version of the distributed metadata repository. The DMS may perform the semantic translation according to a label in the request. Accordingly, the DMS may determine whether a current version of the metadata corresponds to the first version of the distributed metadata repository or the second version of the distributed metadata repository, and may access the metadata in the distributed metadata repository based on the request and the current version of the metadata.

Abstract: Methods, systems, and devices for data management are described. A data management system (DMS) may receive a request to access metadata stored in a distributed metadata repository. The request may have a first semantic format compatible with a first version of the distributed metadata repository. The DMS may translate the first semantic format of the request to a second semantic format compatible with a second version of the distributed metadata repository. The DMS may perform the semantic translation according to a label in the request. Accordingly, the DMS may determine whether a current version of the metadata corresponds to the first version of the distributed metadata repository or the second version of the distributed metadata repository, and may access the metadata in the distributed metadata repository based on the request and the current version of the metadata.

Abstract: Methods, systems, and devices for data management are described. A data management system (DMS) may receive a request to access metadata stored in a distributed metadata repository. The request may have a first semantic format compatible with a first version of the distributed metadata repository. The DMS may translate the first semantic format of the request to a second semantic format compatible with a second version of the distributed metadata repository. The DMS may perform the semantic translation according to a label in the request. Accordingly, the DMS may determine whether a current version of the metadata corresponds to the first version of the distributed metadata repository or the second version of the distributed metadata repository, and may access the metadata in the distributed metadata repository based on the request and the current version of the metadata.

Abstract: A portable amusement lighter, which is to set a gas control propeller inside a lighter casing so as to let the gas control propeller be controlled by a driving control crank for fire striking. When the driving control crank is operated, three face wheels will be driven to rapidly rotate, by means of gears through a gear driving means, so as to provide a special amusing effect while a fire is struck. The present invention is to provide a portable amusement lighter, which is attractive in design and is practical for amusement as well as for making a fire.

Abstract: An amusement lighter, which includes a L-shaped push rod to drive a piezoelectric switch to discharge sparks for ignition, and simultaneously to drive a gear driving device to carry five wheels which have a variety of patterns printed thereon, to rotate just like a slot machine. A movable pressure plate is attached the lighter so that the piezoelectric switch and the flame hole of the lighter can be stopped when the lighter is fastened to one's clothing for carriage.