A method includes receiving a request to modify a first value of a first field of a first item in a self-describing data system, and obtaining a domain comprising items in the self-describing data system. The first item and a second item are included in items, and the second item comprises a second field having a second value. The method includes calculating, based on a rule of the second field, a dependency of the second value on the first value. The rule specifies how the second value is to be calculated using the first value. The method includes modifying, based on the request, the first value. The method includes receiving an event triggered by the modification to the first value. The method includes, responsive to the event, calculating the second value based on the rule, and storing the second value in the second field.

A method for implementing access controls for items of data belonging to a self-describing data structure including obtaining a query definition specifying a requested item of data in the self-describing data structure, determining domains associated with the requested item, the domains including a set of items within the self-describing data structure on an execution path of a query executed according to the query definition. For each respective domain associated with the requested item, the method includes determining subdomains associated with the requested item, determining a role of the user for the respective domain, the role is associated with a set of access permissions to items of data within the domain, and generating an output corresponding to whether access to the requested item is granted based on a policy for each of the subdomains associated with the requested item and the role of the user for the domain.

A computer-implemented method and system for generating partition polygons across a geographic area, wherein a concave hull of the reference network, usually a network of linear features such as roads, and the spatial data objects to be processed is first generated, the resulting concave hull thereby providing the boundary geometry for the final partition scheme. By generating a concave hull from the reference network and the spatial data objects, it is possible to derive a boundary that is based on the spatial position of the reference network and the spatial data objects at the periphery of the geographic area that they cover, that is, the boundary itself connects at least a portion of the end points of the reference network and the spatial data objects.

A method includes receiving a request to modify a first value of a first field of a first item in a self-describing data system, and obtaining a domain comprising items in the self-describing data system. The first item and a second item are included in items, and the second item comprises a second field having a second value. The method includes calculating, based on a rule of the second field, a dependency of the second value on the first value. The rule specifies how the second value is to be calculated using the first value. The method includes modifying, based on the request, the first value. The method includes receiving an event triggered by the modification to the first value. The method includes, responsive to the event, calculating the second value based on the rule, and storing the second value in the second field.

Methods, systems, and apparatuses, including computer programs for generating and using a hash table configured to improve mapping of reads are disclosed that include obtaining a first seed of K nucleotides from a reference sequence, generating a seed extension tree having a nodes, wherein each node of the nodes corresponds to (i) an extended seed that is an extension of the first seed and has a nucleotide length of K* and (ii) one or more locations, in a seed extension table, that include data describing reference sequence locations that match the extended seed, and for each node: storing interval information at a location of the hash table that corresponds to an index key for the extended seed, wherein the interval information references one or more locations in the seed extension table that include reference sequence locations that match the extended seed associated with the node.

Aspects of the present disclosure aim to improve upon systems for managing long database transactions, and the way in which changes made to a database from within a workspace view during a long transaction are committed to the underlying parent database. The present disclosure aims to solve problems caused by the need to refresh a workspace view as part of the process of resolving conflicts between competing workspace views operating on the same portions of the database. Aspects described herein solve the problem through the creation of a separate data structure which effectively logs all of the further transactions which commit changes to parent database. The data structure can be arranged to include all changes committed after a first transaction is opened and worked upon. The process of committing the changes made in the first transaction to the workspace includes performing a recursive search using the data structure.

Systems and techniques for searching multiple data sources are described herein. Users may specify searches of multiple data sources to occur on a periodic basis. The searches may be configured to search time or date ranges that have not previously been searched. A user may select the data sources of interest and specify search terms, review and edit previously created searches, and review results of searches. The system automatically performs the specified searches, and notifies the user and/or a team of the user each time new results are found. The system may efficiently search the data sources by storing previous search results and comparing the previous results to current search results to identify new search results.

A system includes determination of a plurality of queries, each of the plurality of queries indicating a first object as a data source, generation of a first query on the first object based on a first two or more of the plurality of queries, modification of each of the first two or more queries to indicate the first query as the data source, requesting of execution of the first query and the modified first two or more queries, and reception of a result set associated with each of the first two or more queries.

Examples described herein generally relate to executing a received graph database query. The received graph database query can be converted into a recursive common table expression (CTE). Multiple alternative processes for executing the recursive CTE can be generated based on the recursive CTE. A cost associated with each of the multiple alternative processes can be determined. One of the multiple alternative processes can be converted into a multi-step sequence based on the associated cost. The multi-step sequence can be executed on a database to retrieve a set of results in response to the received graph database query.

The present disclosure is related to a software program comprising a source code parser configured to read a source code and interpret each function in the source code. In addition, the program generates meta-data about each function. The code parser may weight each function based on the complexity of the calls to each function to generate weighted meta-data. A visualization program may interpret the weighted meta-data and display an interactive visualization to a user.