2015 revision to DWPI non-structural Fragmentation Codes

The DWPI Section P Fragmentation codes, covering pharmaceutical and agrochemical activity, have been revised and enhanced starting with DWPI update 201501. The revision incorporates 65 new codes suggested by customers and DWPI Editorial Analysts, and includes new specific codes in existing hierarchies, plus codes for new areas that have become important since the last code revision.

Examples of the new codes are:

P213 – Anti-retrovirus
P618 – Anti-cholesterol
P902 – Osteoporosis
P951 – Prion disease
P960 – Personalised medicine

The Section P Fragmentation Codes are valuable to DWPI users as they specifically link the activity concepts to the DWPI chemical indexing for a substance. This includes links to structural Fragmentation Codes, DCR Numbers, Markush Compound Numbers and Ring Index Numbers. These links offer enhanced search accuracy compared to DWPI Manual Codes and other classification systems.

For example, below are searches for specific activities of the drug olanzapine on STN classic:

S E850/M2 (P) P625/M2 (E850 is the fragmentation code for the thienobenzodiazepine fused heterocycle; P625 = hormone active drug)

S 111168/DCR (P) P451/M2(111168 is the DCR number for olanzapine; P451 = antidepressant)

S 46639/RIN (P) P444/M2(46639 is the Ring Index Number for the thienobenzodiazepine fused heterocycle; P444 = anti-parkinson drug)

similar links exist for other non-structural fragmentation code sections e.g. Section Q General Chemistry uses

No new time range code has been introduced for this revision as it does not affect the structural fragmentation codes. The new codes are valid from DWPI update 201501 onwards only, i.e. not indexed into the backfile of DWPI. Users can use the RANGE feature of STN to ensure that the correct codes are used in appropriate time ranges. For example a search for osteoarthritis would be (on STN Classic):

S P424/M2 (produces set L1, P424 is the newly introduced code for osteoarthritis)

S P421 RANGE=-2014(produces set L2, P421 is the generic code for antiarthritic)

S L1 OR L2

An updated code chart showing the complete set of Section P Fragmentation codes. Codes introduced in 2015 are marked in purple type:

Section P Fragmentation Codes Chart 2015

A list of the new and amended codes for 2015:

Section P Fragmentation Codes – New & Amended 2015

A complete list of the Section P Fragmentation codes, including all new, existing and discontinued codes:

Section P Fragmentation Codes – Complete List



Chemical patents currently covered by DWPI are selected for inclusion in one or more of the following twelve sections. All patents with the following IPCs are guaranteed to be included in the Chemical Patents Section: A01N, A21- A23, A61K, B01, B29, C, D, G21.
A – Polymers and Plastics
B – Pharmaceuticals
C – Agricultural Chemicals
D – Food, Detergents, Water Treatment and Biotechnology
E – General Chemicals
F – Textiles and Paper-Making
G – Printing, Coating, Photographic
H – Petroleum
J – Chemical Engineering
K – Nucleonics, Explosives and Protection
L – Refractories, Ceramics, Cement and Electro(in)organics
M – Metallurgy
N – Catalysts



Engineering patents currently covered by DWPI are selected for inclusion in one or more of the following 15 sections based upon the International Patents Classification (IPC) shown in brackets.
P – General
P1 Agriculture, Food, Tobacco (A01 excluding N, A24).
P2 Personal, Domestic (A41-A47).
P3 Health, Amusement (A61-A63, excluding A61K).
P4 Separating, Mixing (B02-B09).
P5 Shaping Metal (B21-B23).
P6 Shaping Non-metal (B24-B28).
P7 Pressing, Printing (B30- B32, B41-B44).
P8 Optics, Photography; General (G02, G03, G09, G10).

Q – Mechanical
Q1 Vehicles in General (B60).
Q2 Special Vehicles (B61-B64).
Q3 Conveying, Packaging, Storing (B65-B68).
Q4 Buildings, Construction (E).
Q5 Engines, Pumps (F01-F15)
Q6 Engineering Elements (F16-17).
Q7 Lighting, Heating (F21-F28, F41-F42).


These 15 Sections are broken down into 103 finer IPC-based Classes so as to narrow the subject matter into finer profiles for greater precision. Classification is made automatically by computer, based on the IPCs on the specification or, where not present, on DWPI-assigned IPCs.

Where a patent falls into more than one of the Sections P or Q, it will be placed in each, and may also occur in one or more of the Chemical Sections A-M or Electronic and Electrical Sections S-X.

Electronic and Electrical


Patents are divided into 21 broad subject areas or Sections. These are designated A-M (Chemical); P-Q (Engineering); and S-X (Electronic and Electrical). The Sections are used as the basis for both the DWPI  Classification and DWPI Manual Code systems.

Electrical and electronics patents covered by DWPI are selected for inclusion in one or more of the following six Sections:
S – Instrumentation, Measuring and Testing
T – Computing and Control
U – Semiconductors and Electronic Circuitry
V – Electronic Components
W – Communications
X – Electric Power Engineering


These six Sections are broken down into 50 Classes. These Classes are assigned according to the technical content as disclosed in the basic specification and take into account all the claims, particularly references to electrical applications, even when the main subject matter is chemical or mechanical in nature.
Where any patent specification falls logically into more than one Section of the Electronic and Electrical Classification it will be included in each of these Sections. Thus a patent involving a TV receiver line output transformer will be included in Classes V02 and W03 (Inductors and Transformers).