Abstract: Embodiments of this application disclose a rule detection method, to increase rule anomaly detection coverage. The method in the embodiments of this application includes: determining, based on an obtained first initial priority corresponding to a first rule, an obtained second current priority corresponding to a second rule, and a determined inclusion relationship between the first rule and the second rule, a first current priority corresponding to the first rule; and then determining, based on a relationship between the first initial priority and the first current priority, whether an anomaly occurs on the first rule.

Abstract: The present application relates to the field of computer technologies, and in particular, to a stop word identification method used in an information retrieval system. In a stop word identification method, after a first query input by a user is acquired, a second query that belongs to a same session as the first query is acquired, and a stop word in the first query is identified according to a change-based feature of each word in the first query relative to the second query. According to the solution provided by the present application, a stop word in a query can be identified more accurately, and efficiency and precision of an information retrieval system are improved.

Abstract: The present application relates to the field of computer technologies, and in particular, to a stop word identification method used in an information retrieval system. In a stop word identification method, after a first query input by a user is acquired, a second query that belongs to a same session as the first query is acquired, and a stop word in the first query is identified according to a change-based feature of each word in the first query relative to the second query. According to the solution provided by the present application, a stop word in a query can be identified more accurately, and efficiency and precision of an information retrieval system are improved.

Abstract: A method, an apparatus, and a system for selecting a service are disclosed. The method is applied in an Open Service Architecture (OSA), and includes: receiving a service invoking request message sent by an external application; obtaining, according to the service information, policy information corresponding to the service to be invoked; and selecting, according to the policy information, a service provision entity to invoke the service. An open service entity is applied in an OSA and includes a receiving module, an obtaining module, and a selecting module. A policy provision entity is applied in an OSA, and includes a providing module. A service selection system is applied in an OSA and includes an open service entity and a policy provision entity. With the present invention, a proper service is selected for the external application according to the policy, and the services of the communication network are invoked more conveniently and accurately.