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+@prefix foaf: <http://xmlns.com/foaf/0.1/> .
+@prefix gn:   <http://rdf.genenetwork.org/v1/id/> .
+@prefix gnc:  <http://rdf.genenetwork.org/v1/category/> .
+@prefix gnt:  <http://rdf.genenetwork.org/v1/term/> .
+@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
+@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+
+gn:mapping_method_qtlreaper
+    skos:definition "Rapidly scan microarray expression data for QTLs" ;
+    foaf:homepage <https://github.com/genenetwork/QTLReaper> .
+
+gn:mapping_method_Rqtl
+    skos:definition "R/qtl is an extension library for the R statistics system.  It is used to analyze experimental crosses for identifying genes contributing to variation in quantitative traits (so-called quantitative trait loci, QTLs).  Using a hidden Markov model, R/qtl estimates genetic maps, to identify genotyping errors, and to perform single-QTL and two-QTL, two-dimensional genome scans." ;
+    foaf:homepage <https://rqtl.org/> .
+
+gn:mapping_method_HappyR
+    skos:definition "Haplotype-based QTL mapping method, often used for multiparent populations." .
+
+gn:mapping_method_PLINK
+    skos:definition
+        "Genome-wide association and population-based linkage analysis tool." .
+
+gn:mapping_method_FastMap
+    skos:definition
+        "Efficient mapping algorithm optimized for large datasets." .
+
+#################################################################
+# Normalization / Averaging Method Concept Scheme
+#################################################################
+
+gn:avg_method_MAS5
+    skos:definition
+        "Affymetrix Microarray Suite 5 normalization method." .
+
+gn:avg_method_PDNN
+    skos:definition
+        "Probe-level normalization method that models sequence-dependent hybridization effects in microarray data." .
+
+gn:avg_method_RMA
+    skos:definition
+        "Robust Multi-array Average normalization for microarray data." .
+
+gn:avg_method_dChip
+    skos:definition
+        "Model-based normalization and expression summarization method for microarray data using probe-level intensity modeling." .
+
+gn:avg_method_GCRMA
+    skos:definition
+        "GC-content adjusted RMA normalization method." .
+
+gn:avg_method_Herit
+    skos:definition
+        "Method that estimates heritability by partitioning phenotypic variance into genetic and environmental components." .
+
+gn:avg_method_Rank
+    skos:definition
+        "Normalization method that transforms values based on their rank order within a dataset." .
+
+gn:avg_method_RankInv
+    skos:definition
+        "Normalization method that applies an inverse rank transformation to enforce a uniform distribution of values." .
+
+gn:avg_method_LOESS
+    skos:definition
+        "Locally estimated scatterplot smoothing normalization." .
+
+gn:avg_method_LOESS_NB
+    skos:definition
+        "LOESS-based normalization method that corrects systematic biases without assuming a parametric noise model." .
+
+
+gn:avg_method_QUANT
+    skos:definition
+        "Quantile normalization method that forces all samples to share the same empirical distribution." .
+
+gn:avg_method_QUANT_NB
+    skos:definition
+        "Quantile normalization method applied without background correction or parametric noise assumptions." .
+
+gn:avg_method_RSN
+    skos:definition
+        "Robust spline normalization method that adjusts microarray data to remove systematic technical variation." .
+
+gn:avg_method_RSN_NB
+    skos:definition
+        "Robust spline normalization method applied without background correction or parametric noise assumptions." .
+
+gn:avg_method_Sscore
+    skos:definition
+        "Statistical scoring method for identifying significant gene expression changes in microarray data." .
+
+gn:avg_method_mlratio
+    skos:definition
+        "Method calculating the log-ratio of expression values between two conditions for microarray analysis." .
+
+gn:avg_method_VST
+    skos:definition
+        "Variance stabilizing transformation for RNA-seq count data to reduce heteroscedasticity." .
+
+gn:avg_method_RPN
+    skos:definition
+        "Robust Probe Normalization method for microarray data to adjust probe-level intensities." .
+
+
+gn:TPM_Log2
+    skos:definition
+        "Transcripts Per Million normalized expression values, log2 transformed." .
+
+gn:avg_method_RPKM
+    skos:definition
+        "Reads Per Kilobase Million normalization for RNA-seq data." .
+
+gn:avg_method_RNA_seq
+    skos:definition
+        "Normalization pipeline applied to RNA sequencing datasets." .
+
+gn:avg_method_SRM
+    skos:definition
+        "Normalization method for targeted proteomics using Selected Reaction Monitoring." .
+
+gn:avg_method_SWATH
+    skos:definition
+        "Normalization and quantification method for SWATH-MS proteomics data." .
+
+gn:avg_method_RPKM_log2
+    skos:definition
+        "Log2-transformed Reads Per Kilobase per Million mapped reads for RNA-seq data." .
+
+gn:avg_method_Sesame
+    skos:definition
+        "Normalization method for Illumina methylation arrays using the Sesame pipeline." .
+
+gn:avg_method_TPM_Log2
+    skos:definition
+        "Log2-transformed Transcripts Per Million for RNA-seq expression quantification." .
+
+gn:avg_method_rlog
+    skos:definition
+        "Regularized log transformation for RNA-seq count data to stabilize variance." .
+
+gn:avg_method_edgeR
+    skos:definition
+        "Normalization and differential expression analysis method for RNA-seq using edgeR." .
+
+gn:avg_method_minfi
+    skos:definition
+        "Normalization pipeline for Illumina methylation arrays using the minfi Bioconductor package." .
+
+gn:avg_method_2Z_8
+    skos:definition
+        "Microarray normalization method that applies a 2Z+8 transformation to expression values." .
+
+gn:avg_method_Log2
+    skos:definition
+        "Simple log2 transformation applied to expression values to reduce skew and stabilize variance." .
+
+gn:avg_method_DESeq2_rlog2
+    skos:definition
+        "Regularized log transformation from the DESeq2 RNA-seq workflow." .
+
+gn:avg_method_N_A
+    skos:definition
+        "Indicates that no normalization or averaging method applies." .