A computer system transforms data. The system displays a user interface including a data flow pane. A user builds a flow diagram in the data flow pane. Each node in the flow diagram specifies an operation: to retrieve data, to transform data, or to create an output dataset. The flow diagram includes a subtree having a data source node and transformation operation nodes. When the user initiates execution and the nodes in the subtree are configured to execute imperatively, the system performs the operations in the subtree sequentially as specified, retrieving data from the data source, transforming the data, and forming an intermediate dataset. When the user initiates execution and the nodes in the subtree are configured to execute declaratively, the system constructs a database query that is logically equivalent to the operations specified in the subtree and transmits the query to the data source to retrieve the intermediate dataset.

Optimizing execution of data transformation flows

A computer system displays a user interface that includes a flow pane, a tool pane, a profile pane, and a data pane. The flow pane displays a node/link flow diagram that identifies data sources, operations, and output datasets. The tool pane includes a data source selector that enables users to add data sources to the flow diagram, and includes an operation palette that enables users to insert nodes into the flow diagram for performing specific transformation operations. The profile pane displays schemas corresponding to selected nodes in the flow diagram, including information about data fields and statistical information about data values for the data fields and enables users to modify the flow diagram by interacting with individual data elements. The data pane displays rows of data corresponding to selected nodes in the flow diagram, and enables users to modify the flow diagram by interacting with individual data values.

User interface to prepare and curate data for subsequent analysis

The invention discloses a software protection method and device. The method comprises the steps of setting a threshold value of authorized service time of software, obtaining reference time through a GPS, determining the service time of the software according to the reference time and limiting use of the software when the service time of the software reaches the threshold value. The device comprises a GPS module and a master control chip, wherein the GPS module is used for obtaining the reference time through the GPS; the master control chip is connected with the GPS module, is connected to a computer through a parallel port or a USB interface, and is used for storing the threshold value of the authorized service time of the software in the computer, determining the service time of the software according to the reference time and limiting use of the software when the service time of the software reaches the threshold value. According to the software protection method and device, accurate and credible real time is obtained through the GPS module, and then software protection time can be accurately controlled; meanwhile, a system clock of the computer can be calibrated, so operation can be simplified, and the time accuracy and safety during use of the software can be improved.

Software protection method and device

A method enables users to resolve errors in a data flow. The method displays a user interface (UI) that includes a flow diagram having a plurality of nodes, receives user specification of a validation rule for a first node of the plurality of nodes in the flow diagram, and determines that an intermediate data set violates the validation rule. In response to determining that the first intermediate data set violates the validation rule, the method identifies errors corresponding to rows in the intermediate data set, and displays an error resolution UI that provides information about the errors. The error resolution UI includes a natural language summary region providing a synopsis of the errors, an error profile region graphically depicting the errors, a data flow trace region providing lineage of the errors in the flow, and a data region displaying data for a subset of columns from the intermediate data set.

Resolution of data flow errors using the lineage of detected error conditions

A method for a first entity and a second entity to establish a shared secret, wherein the first entity and the second entity each have a respective asymmetric key pair that comprises a public key and a corresponding private key, wherein the method comprises: the first entity generating a protected item of software that comprises a representation of the public key of the first entity and a message generator that is configured to use an authentication key; the first entity providing the protected item of software to the second entity; the second entity executing the protected item of software, said executing comprising the message generator generating a message that represents the public key of the second entity and that comprises authentication data generated using the authentication key so that integrity of the message is verifiable using a verification key corresponding to the authentication key; the first entity obtaining the message from the second entity; in response to a set of one or more conditions being satisfied, the first entity and the second entity together performing shared secret establishment to establish the secret, wherein performing the shared secret establishment comprises the first entity using the public key of the second entity as represented in the message and the second entity using the public key of the first entity as represented in the protected item of software, wherein one of the conditions is performance by the first entity of a successful verification of the integrity of the message using the verification key.

Shared secret establishment

A method comprising: carrying out optimization of an item of software in a first intermediate representation; carrying out protection of the item of software in a second intermediate representation different to the first intermediate representation

Optimizing and protecting software

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Optimizing and protecting software