technology

European Classification System

"The European Classification System (ECLA) is an extension of the IPC and is used by the EPO. Both the IPC and ECLA are divided into eight sections, A-H, which in turn are sub-divided into classes, sub-classes, groups and sub-groups. There are approximately 135 000 classification entries in ECLA." "ECLA has been replaced by the Cooperative Patent Classification (CPC) as of January 1, 2013."

"The European Classification System (ECLA) is an extension of the IPC and is used by the EPO. Both the IPC and ECLA are divided into eight sections, A-H, which in turn are sub-divided into classes, sub-classes, groups and sub-groups. There are approximately 135 000 classification entries in ECLA." "ECLA has been replaced by the Cooperative Patent Classification (CPC) as of January 1, 2013."

Canadian Thesaurus of Construction Science and Technology

"There are 15,331 files in the TC/CS. Most of the descriptor terms in the TC/CS are in plural form (i.e. cars). The thesaurus uses the convention: if you can answer the question 'how much ____?' (how much rain), then the term will be listed in the singular form. If you can answer the question 'how many ____?' (i.e. how many cars), then it will be listed in the plural form. If you are unsure, then append a '*' wildcard to the desired words in your search strategy; for example 'survey*'. There are 15,331 files in the TC/CS.

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