The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for RDF skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited RDF over the 3 months to 23 June 2017 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

Resource Description Framework (RDF)
London / City of London
3 months to
23 Jun 2017
Same period 2016 Same period 2015
Rank 165 163 198
Rank change year-on-year -2 +35  
Contract jobs citing RDF 1 1 3
As % of all contract IT jobs advertised in the City of London 0.030% 0.030% 0.052%
As % of the Processes & Methodologies category 0.034% 0.034% 0.064%
Number of daily rates quoted 1 1 1
Median daily rate £650 £450 £540
Median daily rate % change year-on-year +44.44% -16.66%  
UK excluding London median daily rate £615 £656 £625
% change year-on-year -6.28% +5.00%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

RDF is in the process and methodology skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in the City of London with a requirement for process and methodology skills.

Contract Process & Methodology Skills
City of London
Contract job vacancies with a requirement for process and methodology skills 2907 2906 4704
As % of all contract IT job vacancies advertised in the City of London 88.09% 85.87% 80.95%
Number of daily rates quoted 2235 2375 3702
Median daily rate £500 £475 £473
Median daily rate % change year-on-year +5.26% +0.52%  
90% offered a daily rate of more than £350 £335 £325
10% offered a daily rate of more than £650 £625 £625
UK excluding London median daily rate £415 £400 £383
% change year-on-year +3.75% +4.57%  
Number of hourly rates quoted 25 25 56
Median hourly rate £20.00 £19.00 £24.50
Median hourly rate % change year-on-year +5.26% -22.44%  
90% offered a hourly rate of more than £14.75 £12.50 £15.00
10% offered a hourly rate of more than £41.00 £31.50 £55.50
UK excluding London median hourly rate £33.50 £28.50 £30.00
% change year-on-year +17.54% -5.00%  

RDF
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London citing RDF as a proportion of all contract or permanent IT jobs with a match in the Processes & Methodologies category.

Job vacancy trend for RDF in the City of London

RDF
Contractor Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing RDF in the City of London.

Contractor daily rate trend for RDF in the City of London

For the 6 months to 23 June 2017, IT contractor jobs citing RDF also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the City of London region with a requirement for RDF.

1 2 (100.00%) SPARQL
2 1 (50.00%) Hadoop
2 1 (50.00%) Open Source
2 1 (50.00%) NoSQL
2 1 (50.00%) R
2 1 (50.00%) REST
2 1 (50.00%) Natural Language Processing
2 1 (50.00%) Machine Learning
2 1 (50.00%) Mahout
2 1 (50.00%) Big Data
2 1 (50.00%) Big Data Analytics
2 1 (50.00%) Data Analytics
2 1 (50.00%) Business Analytics
2 1 (50.00%) Analytics
2 1 (50.00%) Performance Tuning
2 1 (50.00%) Information Retrieval
2 1 (50.00%) Apache Spark
2 1 (50.00%) MLlib
2 1 (50.00%) API Integration
2 1 (50.00%) UIMA
2 1 (50.00%) Cognitive Computing
2 1 (50.00%) C
2 1 (50.00%) C++
2 1 (50.00%) SQL
2 1 (50.00%) Web Services
2 1 (50.00%) Linux
2 1 (50.00%) Apache
2 1 (50.00%) CRM
2 1 (50.00%) SAS
2 1 (50.00%) HTTP

RDF
Co-occurring IT Skills in the City of London by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 1 (50.00%) Apache
1 1 (50.00%) Apache Spark
1 1 (50.00%) SAS
Applications
1 1 (50.00%) SPSS
Communications & Networking
1 1 (50.00%) HTTP
Database & Business Intelligence
1 1 (50.00%) Big Data
1 1 (50.00%) Hadoop
1 1 (50.00%) Mahout
1 1 (50.00%) NoSQL
General
1 1 (50.00%) Finance
Job Titles
1 1 (50.00%) Architect
1 1 (50.00%) C Developer
1 1 (50.00%) C/C++ Developer
1 1 (50.00%) C++ Developer
1 1 (50.00%) Developer
1 1 (50.00%) Lead Architect
1 1 (50.00%) Objective-C Developer
1 1 (50.00%) SQL Developer
Libraries, Frameworks & Software Standards
1 1 (50.00%) MLlib
1 1 (50.00%) Natural Language Processing
1 1 (50.00%) REST
1 1 (50.00%) RESTful
1 1 (50.00%) UIMA
1 1 (50.00%) Web Services
Miscellaneous
1 1 (50.00%) Management Information System
Operating Systems
1 1 (50.00%) Linux
Processes & Methodologies
1 1 (50.00%) Agile Software Development
1 1 (50.00%) Analytics
1 1 (50.00%) API Integration
1 1 (50.00%) Artificial Intelligence
1 1 (50.00%) Big Data Analytics
1 1 (50.00%) Business Analytics
1 1 (50.00%) Cognitive Computing
1 1 (50.00%) Content Management
1 1 (50.00%) CRM
1 1 (50.00%) Data Analytics
1 1 (50.00%) Information Management
1 1 (50.00%) Information Retrieval
1 1 (50.00%) Machine Learning
1 1 (50.00%) Ontologies
1 1 (50.00%) Open Source
1 1 (50.00%) Performance Tuning
1 1 (50.00%) Scrum
1 1 (50.00%) Software Engineering
1 1 (50.00%) Stakeholder Management
1 1 (50.00%) Use Case
Programming Languages
1 2 (100.00%) SPARQL
2 1 (50.00%) C
2 1 (50.00%) C++
2 1 (50.00%) MATLAB
2 1 (50.00%) Objective-C
2 1 (50.00%) R
2 1 (50.00%) SQL
Vendors
1 1 (50.00%) IBM