Database Management Systems

1Hae is a Protein Data Bank (PDB) identifier. PDB IDs follow a 4-character format (usually 1 number + 3 letters, or similar combinations). EMBL and Genbank are nucleotide databases with different ID formats, and UniProt uses longer alphanumeric codes.

Entrez is NCBI's integrated search and retrieval system that provides access to nucleotide sequences, protein sequences, structures, genomes, literature, and other databases. SRS is a different database system, Google is a general search engine, and BankIt is a sequence submission tool.

MetaCyc is a curated database of metabolic pathways derived from scientific literature, organized around reference pathway maps that represent consensus metabolic knowledge from diverse organisms. Unlike KEGG's species-specific pathways or EcoCyc's E. coli focus, MetaCyc uses generalized reference pathways as its organizing principle.

Ensembl uses MySQL as its primary database system for storing and querying genomic data. Oracle is used by some other bioinformatics resources, MS-Access is not suitable for large-scale databases, and MySQL is the correct choice for Ensembl.

Ensembl is indeed a comprehensive genome database that provides automatic annotation of large genomes. It's one of the major resources for genomic information, housing extensive annotated data for various species. GenBank is a sequence database, UniProt focuses on proteins, and MMDB is for molecular structures, making Ensembl the correct choice for large-scale genome annotation.

Diagrams may be used to depict how data flows from one structure to the other.

Communicational cohesion is when parts of a module are grouped because they operate on the same data (e.g. a module which operates on the same record of information).

Common coupling (also known as Global coupling) occurs when two modules share the same global data (e.g., a global variable). Changing the shared resource implies changing all the modules using it.

This model describes the structure of objects in a system, their identity, relationships to other object attributes and operations.

Actually Transaction _Synchronous is a synchronous process and not a transaction isolation level in EJB.

The structured query language (SQL) is a standardized language for querying information from a database.

The member function good() is used to check whether the state of the stream for input/output operation is good or not. 

This view of the system is defined as a set of structuring rules that allow a system to contain a set of simpler systems each with its own local perspective.

In UML modeling language, vocabulary and rules focus on the conceptual and physical representation of a system. 

UML specification provides a semantic backplane that contains all the parts of all the models of a system and each part is related to one another in a consistent fashion.